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Copyright © 2015 Science Olympiad Foundation. Printed with the permission of Science Olympiad Foundation. No part
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CLASS 8
Contents ªª 13th NSO 2010 ªª 14th NSO 2011 ªª 15th NSO 2012 - SET A ªª 15th NSO 2012 - SET B ªª 16th NSO 2013 - SET A ªª 16th NSO 2013 - SET B ªª 17th NSO 2014 - SET A ªª 17th NSO 2014 - SET B
MTG Work-Books / olympiad books CLASS 1
International Mathematics Olympiad
National Science Olympiad
International English Olympiad
MTG CSS Series
CLASS 2
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
CLASS 3
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
MTG Work-Books / olympiad books CLASS 4
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
CLASS 5
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
CLASS 6
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
MTG Work-Books / olympiad books CLASS 7
National Science Olympiad
International Mathematics Olympiad
National Cyber Olympiad
Science IQ Challenge
Math IQ Challenge
International English Olympiad
MTG CSS Series
Master Mental Ability in 30 Days
CLASS 8
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
Math IQ Challenge
Science IQ Challenge
Psychology of Success
The Secrets of SUCCESS
Master Mental Ability in 30 Days
MTG Work-Books / olympiad books CLASS 9
International Mathematics Olympiad
Math IQ Challenge
National Science Olympiad
Science IQ Challenge
National Cyber Olympiad
Psychology of Success
The Secrets of SUCCESS
International English Olympiad
Master Mental Ability in 30 Days
CLASS 10
International Mathematics Olympiad
Math IQ Challenge
National Science Olympiad
Science IQ Challenge
National Cyber Olympiad
Psychology of Success
The Secrets of SUCCESS
International English Olympiad
Master Mental Ability in 30 Days
MTG Work-Books / olympiad books CLASS 11
International Mathematics Olympiad
Math IQ Challenge
Science IQ Challenge
National Science Olympiad
Psychology of Success
National Cyber Olympiad
The Secrets of SUCCESS
Master Mental Ability in 30 Days
CLASS 12
International Mathematics Olympiad
Math IQ Challenge
Science IQ Challenge
National Science Olympiad
Psychology of Success
National Cyber Olympiad
The Secrets of SUCCESS
Master Mental Ability in 30 Days
Class
1 to 10
JEE (Main & Advanced) | AIPMT | BOARDS | OLYMPIAD | NTSE
FOUNDATION COURSE For Classes 7, 8, 9 & 10 Class 7
Class 8
Class 9
Class 10
Class 8 13th
Year 2010
Copyright©2015. Science Olympiad Foundation (SOF)
CLASS 8 - 13th NSO - 2010
MENTAL ABILITY 1.
Select a Pythagorean triplet whose one member is 18. (A) 18, 80, 82
2.
5.
(C) 300
(D) 400
(B) Day 35
(C) Day 10
(D) Day 60
(A) 18
(B) 20
(C) 24
(D) None of these
David's teacher asked him to solve the problem shown below. (–125 + 175) + (–125 + 165) + 110 David's answer is 190 which is incorrect. What is the correct answer? (B) 160
(C) 200
(D) 210
In the given question, 'D' means 'is greater than', '%' means 'is lesser than', ' ' means 'is equal to', '=' means 'is not equal to', '+' means 'is a little more than'; b and b + c, then _______ If a (A) a % c
7.
(B) 200
Find the number of triangles in the given figure.
(A) 150 6.
(D) 18, 72, 92
Jasmine needs ` 30 to buy a sweater. She uses the following plan to save money. The first day she sets aside ` 1. The second day Jasmine sets aside ` 1.50. The third day she sets aside ` 2, and on the fourth day she sets aside ` 2.50. If Jasmine continues this pattern, on which day will she have enough money to buy the sweater ? (A) Day 30
4.
(C) 80, 102, 112
If the diameters of the Sun and the Earth are 1.4 × 10 9 metres and 1.275 × 10 7 metres respectively. Then the diameter of the Sun is about how many times the diameter of the Earth ? (A) 100
3.
(B) 18, 83, 102
(B) c % a
(C) c + a
(D) c
a
A box of identically shaped light bulbs contains the following: • 13 blue light bulbs • 10 green light bulbs • 16 orange light bulbs
• 11 red light bulbs
If a light bulb is chosen at random from the box, what is the probability that it will be green? (A) 8.
1 4
1 5
(C)
1 10
(D)
1 50
In a certain code, FAVOUR is written as EBUPTS. How is DANGER written in that code? (A) CBFFDS
9.
(B)
(B) CBMHDS
The given chart shows the number of goals by the Sharks soccer team and their opponents for 5 games. In what percent of the games did the Sharks score more goals than their opponents ?
(C) EBFHDS
Goals scored by Sharks and Opponents Game
Number of goals Number of goals scored by the Sharks scored by Opponents
st
1
nd
2
(A) 40%
rd
3
(B) 50%
th
4
(C) 80%
th
5
(D) 100%
(D) EBHHFS
5
3
4
0
3
2
4
6
5
1
10. Find the missing characters from the given series. A, CD, GHI, ?, UVWXY (A) LMNO 13 th NSO | LevelI | Class 8
(B) MNO
(C) MNOP 2
Copyright©2015. Science Olympiad Foundation (SOF)
(D) NOPQ
CLASS 8 - 13th NSO - 2010
11. Choose the correct mirrorimage of the Fig. (X) from amongst the four given options. Fig. (X)
(A)
(B)
(C)
(D)
12. Three different positions of a dice are shown. How many dots lie opposite 2 dots? (A) 1
(B) 3
(C) 5
(D) 6
(i)
(ii)
(iii)
13. Aisha had an original square with a side length of y units. She cut out a smaller square with a side length of x units from the original square. Which of the following expressions represents the remaining area of the original square after the smaller square was cut out? (A) y 2 – x 2 sq. units (B) (y – x)(x) sq. units (C) (y – x)(x – y) sq. units (D) (y – x) 2 sq. units 14. The total area of Alaska is 591,000 square miles. Which of the following is 591,000 expressed in scientific notation? (A) 591 ´ 10 4
(B) 5.91 ´ 10 5
(C) 59.1 ´ 10 5
(D) 5.91 ´ 10 6
15. Dev wants to enlarge a photograph that measures 3 inches by 5 inches. If both dimensions are doubled, what happens to the area of the photograph? (A) It is doubled
(B) It is multiplied by 4
(C) It remains the same (D) It is multiplied by 8
SCIENCE 16. With the help of given figure, find which of the following options is correct ? (A) (B) (C) (D)
The apple pulls with greater force than the earth pulls the apple. The apple pulls with smaller force than the earth pulls the apple. The apple pulls the earth with the same force that the earth pulls the apple. All of these.
17. The oscilloscope traces for sound waves with different frequencies are shown below. The noises shown in the diagram in the increasing order of frequency are a (A) Car engine, Scream, Dentist's drill, Road drill (B) Road drill, Car engine, Dentist's drill, Scream (C) Scream, Car engine, Dentist's drill, Road drill Car engine Scream Dentist's drill Road drill (D) Dentist's drill, Road drill, Scream, Car engine 18. Pankaj took a photo at night by leaving the shutter of his camera open for about a few hours. The diagram on the right shows the picture he got. What causes the stars in Pankaj's photo to look like they are spinning around the night sky ? (A) The rotation of earth
(B) The rotation of moon
(C) The rotation of sun
(D) None of these
19. When pressure is applied through a piston at the top of a closed tube containing water, the pressure is transmitted to (A) Only the bottom of container (B) All directions (C) Only the side faces and the bottom of the container (D) None of these 3
Copyright©2015. Science Olympiad Foundation (SOF)
13 th NSO | LevelI | Class 8
CLASS 8 - 13th NSO - 2010
20. A toy car is released from point X of the ramp and travels towards point Y. What is/are the forces responsible for pulling the car towards point Y ? (i) Weight of the car X (ii) Earth's magnetic field p (iii) Frictional force between the wheels and the ramp Ram (A) (i) only
(B) (i) and (ii) only
(C) (ii) and (iii) only
(D) All of these
Y
Angle of ramp
21. In which of the following will the bulb light up?
(A)
(B) Sugar solution
(C)
(D) Distilled water
Kerosene
Salt solution
22. A negatively charged balloon is brought near a neutral metal sphere. Which one of these diagrams correctly shows the distribution of charges on the metal sphere?
(A)
(B)
(C)
23. A spring balance was used to measure the force needed to pull a wooden block across different surfaces. The table shows the results. The force is expressed in newton. In which of the following surfaces is the friction greatest ?
(D)
Floor surface
Force needed to just start moving
Carpet
8 N
Glazed tiles
5 N 4 N 10 N
(A) Carpet
(B) Glazed tiles
Polished wood
(C) Wood
(D) Door mat
Door mat
Glass jar
24. A scientist performed an experiment as shown in the figure. What happened when air was pumped out of the jar completely and he rang the bell ?
Ringing electric bell
(A) The sound became louder. (B) The sound became fainter first and then louder once all the air was pumped out. (C) The sound could not be heard anymore.
To vacuum pump
(D) The sound was the same as before.
25. Which of these represents the correct order of planets in the solar system in relation to the Sun? (A) Venus, Mars, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune (B) Earth, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune (C) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus (D) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. 26. Which of the following doesn't reduce friction? (A) Ball bearing
(B) Lubricant
(C) Rolling
(D) Grooving and treading
27. The figure shows what happens to a ray of light as it strikes a plane mirror. Which statement is not true about this figure?
O Mirror t r de n In ci
y
A
ra
Copyright©2015. Science Olympiad Foundation (SOF)
d
4
te
(D) If BO is the incident ray, then OA will be the reflected ray.
i r
c le
(B) AO is the incident ray. (C) O is the only point from where the light ray can be reflected.
f Re
ay
(A) ÐAON = ÐBON.
13 th NSO | LevelI | Class 8
Point of incidence
N
B
CLASS 8 - 13th NSO - 2010
28. A building is protected from the effect of lightning by using _____ (A) Seismograph
(B) Electroscope
(C) Lightning conductors (D) Anemometer
29. When a force is applied to a stationary object, several effects are possible. Which of the following effects is not possible? (A) The object moves (B) The object rotates (C) The object remains stationary (D) The mass of the object increases. 30. Air or liquid always moves from a region of high pressure to low pressure. When we press the bulb of a dropper and dip the nozzle in water container (bulb still pressed), and then remove the pressure_____ (A) Level of water rises up in the container (B) Water rises in the dropper (C) Water level remains same in the container
(D) Can't be said
31. Study the table carefully : Sample
Blue litmus to red
Red litmus to blue
ü
´
(ii) Sugar syrup
´
ü
(iii) Lime water
´
ü
(iv) Soap solution
ü
´
(i)
Tamarind juice
Which of the above are correctly matched ? (A) (i) & (iii)
(B) (ii) & (iv)
(C) (i), (ii) & (iii)
(D) (i), (iii) & (iv)
32. Out of the total water present on earth, more than 97% is in seas and oceans, which is saline water. This cannot be utilised for human needs as humans can use only fresh water. How much fraction of the total water is available for our use? (A) 3%
(B) 2.1%
(C) 1.14%
33. Observe the given flowchart carefully and mark the appropriate option correctly representing I, II and III. I II III (A) Sweet
Calamine
Formic acid
(B) Bitter
Formic acid
Baking soda
(C) Bitter
Baking soda
Calamine
(D) Sweet
Formic acid
Baking soda
(D) 0.006%
SUBSTANCES
Sour in taste When ants bite II is injected into the skin
34. Pick the incorrect option. Physical Change (A) Cutting vegetables into small pieces (B) Heating an iron object (C) Making chapattis from dough (D) Stretching of spring
I in taste III Neutralises the effect of ant bite
Chemical Change Cooking vegetables Rusting of iron Kneading dough from flour Digestion of food
35. Read the given statements and mark the correct option. Statement 1 : Metals are sonorous. Statement 2 : Metals are generally brittle in the solid state, they break into pieces when hammered. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false.
(D) Both statements 1 and 2 are false. 5
Copyright©2015. Science Olympiad Foundation (SOF)
13 th NSO | LevelI | Class 8
CLASS 8 - 13th NSO - 2010
36. Match the items given in column A with the synthetic fibres from which they are obtained in column B and mark the correct option. Column A
Column B
(P)
(i)
Bakelite
(Q)
(ii)
Nylon
(R)
(iii) PET
(S)
(iv) PVC
(A) (P)(ii); (Q)(i); (R)(iv); (S)(iii)
(B) (P)(iv); (Q)(ii); (R)(i); (S)(iii)
(C) (P)(iii); (Q)(ii); (R)(i); (S)(iv)
(D) (P)(i); (Q)(iii); (R)(ii); (S)(iv)
37. 'P' is processed in industries to get some useful products such as 'Q', 'R' and 'S'. 'S' is obtained during the processing of 'P' to get 'Q', 'R' is a mixture of about 200 substances. Identify 'P', 'Q', 'R' and 'S'. P Q R S (A) Coal
Coal tar
Coke
Coal gas
(B) Coke
Coal
Coal tar
Coal gas
(C) Coal
Coke
Coal tar
Coal gas
(D) Coke
Coal
Coal gas
Coal tar
38. Match the following : Column I 1. Rapid combustion 2. Spontaneous combustion 3. Explosion 4. Sodium carbonate
(p) (q) (r) (s)
Column II Materials get ignited without any apparent cause Fuel burns rapidly and produces heat and light Fire extinguisher Evolution of large amount of heat, light and sound
(A) 1 – (q); 2 – (p); 3 – (s); 4 – (r)
(B) 1 – (p); 2 – (q); 3 – (r); 4 – (s)
(C) 1 – (r); 2 – (s); 3 – (q); 4 – (p)
(D) 1 – (s); 2 – (r); 3 – (q); 4 – (p)
39. The shape of the bacteria shown in the figure is (A) Bacilli (B) Cocci (C) Vibrio (D) Spirillum 40. Which of the following is not a forest product ?
(A)
13 th NSO | LevelI | Class 8
(B)
(C)
6
Copyright©2015. Science Olympiad Foundation (SOF)
(D)
CLASS 8 - 13th NSO - 2010
41. Which of the following methods will reduce air pollution ? (A) Planting trees
(B) Use of LPG and CNG
(C) Use of catalytic converter
(D) All of these
42. Sumana prepared maida dough by taking ½ kg flour to which she added some sugar, mixed with warm water and at the end added a small amount of yeast powder. After two hours, she observed that the dough got raised. Which of the following is correct regarding this? (A) (B) (C) (D)
Flour undergoes fermentation that results in raised dough. Yeast reproduces rapidly in number which increase volume of the dough. Yeast produces carbon dioxide during fermentation that fills the dough and increases its volume. Water vapour formed from warm water raises the volume of the dough.
43. In which of the following agricultural methods, the nutrient needs of one crop are fulfilled by the other crop ? = Ground nut t = Wheat
(A)
vv vv vv vv vv
v v v v v
v v v v v
= Rice v = Soyabeans t tt t t t t t
(B)
(C)
t t t tv v v v t t t tv v v v t t t t v v v v
(D)
44. a c b d Which of the following is the correct sequence of use of the above given tools in the agricultural
practices ? (A) a, b, c, d
(B) d, c, b, a
(C) d, b, a, c
(D) c, a, d, b.
45. A habitat change may result in the decline of the numbers of a given species. Such species slowly become P. This means that the species are on the verge of becoming Q. Some animals whose number has gone down to critically low levels are called R. A species is considered S when no member of the species is still alive. Which of the following is correct sequence for P, Q, R and S in the above paragraph. P Q R S (A) Vulnerable Endemic Extinct Endangered (B) Endangered Vulnerable Threatened Extinct (C) Vulnerable Endangered Critically endangered Extinct (D) Endangered Critically endangered Extinct Vulnerable 46. Anil wants to see microscopic view of the organelle which takes part in the transmission of hereditary characters from one generation to the next. Which labelled part will his teacher focus to make a microscopic view of the organelle ? (A) P
(B) Q
(C) R
(D) S 7
Copyright©2015. Science Olympiad Foundation (SOF)
P Q R S
13 th NSO | LevelI | Class 8
CLASS 8 - 13th NSO - 2010
47. The given figures show the feet of four different birds. T hey are variously adapted according to their respective functions. a Which of the following is correct regarding this ? To run on flat ground To walk on muddy ground (A) c a (B) b d (C) a c (D) c a
b
To grip prey b a d d
c
d
To scratch for worms d c b b
48. Ritu, Shweta and Urvashi want to find out who among them has the largest lung capacity. They decide to blow air into a balloon in one breath and see how big it becomes. Which of the following factors must they keep same to make the test a fair one? (i) Colour of the balloon (ii) Size and shape of the balloon (iii) Whether to breathe in before blowing (iv) Material of the balloon (A) (i) & (ii)
(B) (ii) & (iii)
(C) (i), (iii) & (iv)
(D) (ii), (iii) & (iv).
49. Which of the following is not the adaptation of polar bear for the extreme climate in polar regions ? (A) Long curved and sharp claws – Help to walk on ice (B) Thick layer of fur – Keeps it warm (C) Large ears and long legs – Conserve body heat (D) Fat layer beneath the skin – Insulates the body from cold. 50. Megha and Farheen were performing an experiment on plant reproduction. They both placed a potato in the soil and observed the changes after few days. Which of the following will they observe? (A) Young roots will rise from the potato
(B) Young shoots will rise from the potato
(C) Potato will increase in number
(D) Both (A) & (B) SPACE FOR ROUGH WORK
13 th NSO | LevelI | Class 8
8
Copyright©2015. Science Olympiad Foundation (SOF)
Class 8 14th
Year 2011
Copyright©2015. Science Olympiad Foundation (SOF)
2
CLASS 8 | 14th NSO - 2011
MENTAL ABILITY 1.
A honeybee colony that contains 50,000 bees in late fall may have only 10,000 bees at the end of
winter. What percent of the bees live through the winter season? (A) 80% (B) 20% (C) 25%
2.
Snow Mountain has a snow-machine that will lay down an inch of snow per hour over an area of
(D) 50%
40,000 square feet. Which expression shows how to find the number of hours this machine takes
to lay down 1 inch of new snow on a ski run that is 800 feet long and 150 feet wide? 40, 000 (800 × 150) (150 × 40, 000) (800 × 40, 000) (A) (B) (800 × 150) (C) (D) 40, 000 800 150
3.
A sum of ` 11200 is shared among Mr. Khare, Mr. Patel and Mr. Verma. Mr. Khare gets while Mr. Patel gets
(A) ` 6006
1 th of it. The amount Mr. Verma gets is _____. 5 (B) ` 6160 (C) ` 3080
1 th of it 4
(D) Data insufficient
DIRECTION (Q.Nos. 4 -5): Use the graph given below to answer the following questions. 4.
About how many grams of sugar will dissolve 4 cups
of water at 140° F? (A) 5 (B) 6 (C) 7 (D) 8
5.
What conclusion can be drawn from the graph?
(A) Sugar raises the temperature of water.
(B) Sugar will not dissolve in cold water.
(C) The hotter the water, the more sugar will dissolve in it.
(D) A given amount of water will dissolve an equal amount of sugar.
6.
A sum of ` 3,90,200 is to be paid back in three equal annual instalments. How much is each
instalment, if the rate of interest charged is 4% per annum compounded annually ? (A) ` 140608 (B) ` 120560 (C) ` 10000 (D) ` 18000
7.
The value of the expression
1 (0.3)1/ 3 ⋅ 27
1/ 4
⋅ (9)1/ 6 ⋅ (0.81)2 / 3
1 (0.9)2 / 3 ⋅ (3)−1/ 2 ⋅ 3 (B) 0.9
−2
is _____.
⋅ (243)−1/ 4
(A) 0.3
(C) 1.27
(D) 0.09
8.
The diagram given shows a three-dimensional object made of 11
identical cubes.
Which of the following best represents the top view of this threedimensional object ? (A)
(B)
(C)
(D)
Copyright©2015. Science Olympiad Foundation (SOF)
3
CLASS 8 | 14th NSO - 2011
9.
Mr. Mittal purchased a car for ` 3,00,000 and a bike for his son for ` 1,00,000. He sold the car at
a profit of 10% and bike at a loss of 20%. What is the net gain or loss? (A) 2% gain (B) 1.5 % loss (C) 2.5 % loss
(D) 2.5% gain
10. What should come in place of the question mark (?) in the following number series?
(A) 6
50, 26, 14, ?, 5, 3.5 (C) 10
(B) 8
(D) 12
11. Sonali invests 15% of her monthly salary in insurance policies. She spends 55% of her monthly salary on shopping and household expenses. She saves the remaining amount of ` 12,750. What is Sonali's monthly income ? (A) ` 42,500 (B) ` 38,800 (C) ` 40,000 (D) ` 35,500 12. In a certain code 'ja ki mo pe' means 'at a frog's leap', 'mo la ki so' means 'take a leap ahead' and 're bo ja na' means 'insects are frog's diet'. Which of the following is the code for 'at' in that
language ? (A) ja
(B) pe
(C) bo
(D) re
13. In the given question which one of the four answer figures should come after the problem figures, if the sequence is continued ?
(A)
(B)
(C)
(D) Bridge
14. An engineer models a bridge crossing a river using two parallel lines to represent the river banks and two parallel lines to represent the
1 3
bridge. The bridge is not perpendicular to the river banks. Which of the following statements about the angles formed between the bridge
and the river banks must be true ? (A) ∠5 + ∠3 = 90°
(B) ∠1 + ∠8 = 180°
(C) ∠1 = ∠8
(D) ∠2 + ∠6 = 180°
5 7
2 4 6 8
River Bank
15. If the given interchanges are made in signs and numbers, which one of the four equations would be correct ?
Given interchanges : signs '+' and '–'; numbers '5' and '8'. (A) 82 – 35 + 55 = 2 (B) 82 – 35 + 55 = 102 (C) 85 – 38 + 85 = 132
SCIENCE 16. The graph shown here provides information about noise levels in different situations. Which of the following scenarios can create a noise level as indicated on the graph by the letter A?
(A) A plane taking off
(B) A few dogs barking
(C) Some people talking loudly
(D) Metro train moving on tracks Copyright©2015. Science Olympiad Foundation (SOF)
(D) 52 – 35 + 55 = 72
4
CLASS 8 | 14th NSO - 2011
17. Study the circuit diagram given here carefully.
Bulb A would light up only when two switches are closed.
Which of the following are the two switches? (A) W and X (C) X and Y
(B) Y and Z (D) W and Z
18. Sangi needs to identify three different materials, X, Y and Z. Material X casts a faint shadow when light is shone on it. Material Y does not cast a shadow when light is shone on it. Material Z casts
a clear shadow. Which one of the following could materials X, Y and Z be? X Y Z (A) Fabric Metal Tracing paper (B) Tracing paper Glass Metal (C) Tracing paper Glass Fabric (D) Glass Fabric Metal
19. A mirage is observed when ______.
(A) Density of air decreases with increase of height.
(B) Density of air increases with height.
(C) Refractive index of air decreases with increase of height.
(D) Earth acts like a mirror.
20.
Which of the following statements is false in case of a comet ? (A) They revolve around in highly elliptical orbits. (B) Tail of a comet is always directed away from the sun. (C) They are commonly known as shooting stars. (D) Their period of revolution round the sun is very long.
21. Two parallel rays of light A and B as shown in the figure pass through two boxes. The possible
combination of devices used in boxes I and II are ______. (A) Convex lens and concave lens (B) Concave mirror and convex mirror (C) Concave lens and concave mirror (D) Concave lens and convex lens
22. Which of the following is/are correct ?
(1) Besides helping in finding distance of an object, SONAR also indicates its range.
(2) Megaphone is a device which works on the principle of reflection of sound.
(3) Ultrasonics are used to detect earthquakes.
(4) Like light, sound waves also obey laws of reflection. (A) 2, 3 and 4 (B) 1, 2 and 3 (C) 1, 2 and 4
(D) 1, 3 and 4
23. Match the options given in Column A with Column B and mark the correct option.
Column A
Column B
Electrolyte (i) Cathode (ii) Electrolysis (iii) Anode (iv) a-(iii), b-(iv), c-(i), d-(ii) a-(iv), b-(iii), c-(i), d-(ii)
Production of magnesium chloride Negatively charged electrode Copper sulphate solution Connected to negative pole of battery. (B) a-(ii), b-(iii), c-(iv), d-(i) (D) a-(i), b-(ii), c-(iv), d-(iii)
(a) (b) (c) (d) (A) (C)
Copyright©2015. Science Olympiad Foundation (SOF)
5
CLASS 8 | 14th NSO - 2011
24. Two plane mirrors AB and CD are placed at right angles to one another. A ray of light PQ hits AB at Q making an angle of 45° as shown in the diagram. This ray will be reflected from mirror
BD at an angle of ____. (A) 20° (C) 45°
(B) 35° (D) 60°
25. The melting and boiling points of three substances are shown below. What will be the state of the substances at 98°C? A B C Substance (A) Gas Liquid Solid A (B) Liquid Solid Gas B (C) Solid Gas Solid C (D) Solid Gas Liquid
Boiling point
Melting point
105°C
100°C
89°C
72°C
100°C
97°C
26. The diagram given below shows a ball rolling down a slope. The ball finally comes to a stop by itself. Which of the following statements describes what most likely caused the ball to stop?
(A) The heat produced as a result of its motion.
(B) The speed produced as a result of its motion.
(C) The friction between the ball and the surface.
(D) The energy produced as a result of its motion.
27. A ray of light is shown through the hole in a cardboard. Which of the following diagrams show
the (A) (B) (C) (D)
correct direction of light passing through the cardboard? 1 and 2 2 and 3 1 and 3 3 and 4
28. Satish found that when he hung standard weights on a particular spring, the spring was extended. He measured the length of the spring when 100 g, 250 g and 400 g
weights were hung on it and recorded the results in the table given below. Weight used/g
Length of spring/cm
100
10
250
13
400
16
Satish then hung his textbook on the spring and found that the length of the spring was 14.5 cm.
The weight of his textbook in g is _____. (A) 275 (B) 325
(C) 300
(D) 375
29. Read the given statements and mark the correct option.
Statement 1 : A person seated in a moving train is at rest with respect to another train moving in the opposite direction.
Statement 2 : If the train covers equal displacement in equal intervals of time then it moves with
uniform acceleration. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Both statements 1 and 2 are false. Copyright©2015. Science Olympiad Foundation (SOF)
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CLASS 8 | 14th NSO - 2011
30. Look at the diagram. Which one of the following should material M be to
ensure that the cold drink is kept cool for the longest period of time? (A) Metal cold drink (B) Plastic (C) Thermocol (D) Waxed paper
M
31. We should not wear polyester clothes while working in kitchen because _____. (A) It produces heat and we feel hot. (B) It feels uncomfortable, as it does not allow air to pass through. (C) Its fabric melts and sticks to the body, in case of fire. (D) It is not hygienic to wear synthetic fibre clothes. 32. Some materials like magnesium ribbon, aluminium foil, copper wire and charcoal (powder) were taken in different test tubes labelled as P, Q, R and S. 5 mL of dilute hydrochloric acid was added to each test tube. When a burning match-stick is brought near the mouth of each test tube, in which cases pop sound would be heard? (A) Only P (B) P and Q (C) Q and S (D) P, Q and R 33. Y is formed when X is heated in absence of air. Y is tough, porous and black substance. Both X and Y are carbon-rich materials. What could X and Y be? (A) X = Coal, Y = Coke (B) X = Petroleum, Y = Petrol (C) X = Coal, Y = Coal tar (D) X = Petroleum, Y = Diesel 34. Water is a very good fire extinguisher. It can be used in case of fire of _____. (A) Electrical equipment (B) Oil and petrol (C) Forest (D) All of these 35. Ritika noted the initial colour of the solutions in beakers I, II, III and IV. After inserting zinc rods in each solution and leaving undisturbed for two hours, she noted the colour of each solution again. Mark the beakers in which colour change is observed?
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
36. Smita carried out some experiments with China rose petals.
She placed China rose petals in a beaker and added some hot water. She divided this solution into three test tubes and added acid to one, base to another and left the third one as such. But she forgot to label these test tubes. Identify the correct
match for the solution in each test tube. (A) X - Base, Y - Indicator, Z - Acid (C) X - Acid, Y - Base, Z - Indicator
37. Rusting cannot be prevented by _____. (A) Oiling (C) Alloying
(B) X - Indicator, Y - Acid, Z - Base (D) X - Acid, Y - Indicator, Z - Base (B) Galvanisation (D) Wrapping iron object with paper
38. Which of the following can be beaten into sheets? (A) Zinc (B) Phosphorus (C) Sulphur Copyright©2015. Science Olympiad Foundation (SOF)
(D) Oxygen
7
CLASS 8 | 14th NSO - 2011
39. Which of the following agricultural tools is/are used in weeding ?
(A) (ii) & (iii)
(B) (iv) only
(C) (i), (iii) & (iv)
(D) (i) only.
40.
Which of the following describes moulting? (A) The resting stage in the life cycle of a silkworm (B) Change in appearance during the different stages in the life cycle of a silkworm (C) Spinning of cocoon (D) Casting off old skin.
41. Match Column I with Column II and select the correct option from the codes given below.
(a) (b) (c) (d) (A) (C)
Column I Endemic species (i) Endangered species (ii) Vulnerable species (iii) Rare species (iv) a-(ii), b-(iii), c-(i), d-(iv) a-(iii), b-(i), c-(ii), d-(iv)
Column II Species that exist in very small number Species found exclusively in a particular area Species that are likely to become endangered Species that are likely to get extinct in the near future (B) a-(iv), b-(ii), c-(iii), d-(i) (D) a-(ii), b-(iv), c-(iii), d-(i).
42. Refer the given figure of a cell. Which organelle is more in number ? Also, identify among P, Q, R and S, the organelle which is responsible for transmission of hereditary information.
(A) Endoplasmic reticulum; P (B) Mitochondrion; Q (C) Ribosome; R
(D) Golgi body; S
44. Refer the given graph of menstrual cycle.
What happens after day 28 ? (A) Ovulation (B) Implantation (C) Menopause (D) Menstruation
Thickness of uterus lining
43. Which of the following effects is not due to SPM ? (A) Interference with photosynthesis (B) Respiratory problems (C) Eutrophication (D) Blackening of buildings and monuments
0
7
14
21
28
Time (days)
45. Refer the given experiment. What can you conclude from it ?
(A) Boiled rice does not contain starch.
(B) Saliva reacts with iodine solution and alters its property.
(C) Saliva converts starch to sugars which do not give blue-black colour with iodine.
(D) All of these.
Drops of iodine solution (yellow) Turned blue-black Boiled rice
Turned reddishbrown
Boiled rice and saliva
46. How can plants prevent self pollination ? (A) Stamen and pistil mature at different times. (B) Plants should develop bisexual flowers. (C) Pistil should have increased receptivity for pollens from same plant. (D) All of these. Copyright©2015. Science Olympiad Foundation (SOF)
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CLASS 8 | 14th NSO - 2011
47. Megha lives in a hill station where houses have shapes
as given in the figure. The triangular shape of roof helps in draining out rainwater from the roof. She observes that during thunderstorm, roof tops of many houses get blown away causing massive destruction. What can be the reason for this ? (A) Wind blowing above the roof creates high pressure. The pressure difference exerts force inside and thus lifts up the roof. (B) Wind blowing above the roof creates low pressure. The pressure difference exerts force inside and thus lifts up the roof. (C) Wind blowing above the roof exerts force over it, this lifts the roof. (D) Wind blowing above the roof heats up the roof, this lifts the roof.
48. The given figure shows a model demonstrating the mechanism of breathing. What is incorrect about the model ?
(A) During inhalation diaphragm moves downwards.
(B) During exhalation lungs reduce in size.
(C) During inhalation and exhalation, rib cage does not move.
(D) During inhalation and exhalation, windpipe does not move.
49. Which of the following is not a renewable energy ? (A) Nuclear energy (B) Hydropower energy (C) Geothermal energy 50. What is X in the given figure ? (A) Xylem (B) Phloem (C) Xylem and phloem (D) Stomata SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
(D) Solar energy
Class 8 15th
SET A Year 2012
Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
1
2
MENTAL ABILITY ( x − 1) is equal to _____. x (B) 2 2
1.
If x = 5 + 2 6, then
(A)
2.
If a company sells a car with a marked price of ` 2,72,000 and gives a discount of 4% on ` 2,00,000
and 2.5% on the remaining amount then the actual price charged by the company for the car is ___. (A) ` 2,50,000 (B) ` 2,55,000 (C) ` 2,60,100 (D) ` 2,62,200
3.
The characters in given matrix follow a certain trend, row-wise or column-wise.
Find out this trend and choose the missing character from the given
options. (A) 3 (C) 7
4.
2
(C)
(D) 2 3
3
(B) 6 (D) 9
31 17
58 87
68 19
61 56
91 22
70 50
10 142 11
?
The difference between simple interest and compound interest on a certain sum of money for 2 years at 4% per annum is ` 20. Then the sum is ____. (A) ` 13,500 (B) ` 12,500 (C) ` 11,500 (D) ` 15,200
5.
The squares which should be shaded to make the adjoining figure symmetric is ____.
(A) P and Q
(B) P and S
(C) Q and R
(D) R and S
6.
Which of the following statements is correct? (A) All rectangles are squares. (C) All rhombuses are parallelograms.
(B) All kites are rhombuses. (D) All trapeziums are squares.
7.
The number of two digit numbers which are both perfect squares and perfect cubes is______ . (A) 0 (B) 2 (C) 1 (D) 3
8.
In the given matrix, find out which of the options completes the figure matrix?
(A)
(B)
(C)
(D)
9.
The (A) (B) (C) (D)
area of the adjoining polygon (not drawn to scale) is ____. 109 cm2 280 cm2 322 cm2 900 cm2
10. The sum of the digits of a 2-digit number is 12. If the new number formed by reversing the digits
is greater than the original number by 54, then the original number is ____. (A) 39 (B) 93 (C) 49 (D) 23
11. In a certain code language, 'put tir fin' means 'delicious juicy fruit', 'tie dip sig' means 'beautiful white lily' and 'sig lon fin' means 'lily and fruit'. Which of the following stands for 'and' in that language? (A) lon (B) sig (C) fin (D) None of these Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
2
3
12. The given pie-chart shows the percentage of Literate and Illiterate– Males and Females in a city.
The difference between the number of Literate Males and Literate Females is _____.
(A) 75,000
(B) 1,500
(C) 5,000
(D) 500
13. Simplify the following expression : −51x 5 y 12 − 34 x 12 y 5
−17 x 5 y 5 3y 7 + 2x 7 2 2 3y 6 + 2x 6 2 2 (A) − (B) ( x y ) (x y ) 2 3
120 x 7 y 8 54 x 2 y 4 × ÷ 9 xy 40 x 4 y 3 6 6 2 2 (C) (3 y + 2 x )( x y ) 3
7 7 2 2 (D) − (3 y + 2 x )( x y ) 2
14. In the set of problem figures, there is a definite relationship between figures P and Q. Establish a similar relationship between figures R and S by selecting a suitable figure from the options that would replace the question mark (?) in the Problem Figures. Problem Figures
P
(A)
(B)
Q
? R
(C)
S
(D)
15. A cistern from inside is 12.5 m long, 8.5 m broad and 4 m high and is open at top. The cost of
cementing the inside of a cistern at ` 24 per sq m is ______. (A) ` 6582 (B) ` 8256 (C) ` 7752
(D) ` 8752
SCIENCE 16. A thin tube contains a thread of mercury which traps air at the end of the tube. The other end of the tube is open to the atmosphere. When the tube is turned upside down, the volume of the trapped air increases.
It is (A) (B) (C) (D)
because ______. The air gets hotter when the tube is turned upside down The atmosphere pushes less when it acts upwards on the mercury The pressure in the trapped air is reduced The trapped air molecules hit the mercury harder when travelling downwards
17. Which of the following does not produce a sound wave? (A) A silencer fixed gun fired (B) A bell ringing under water (C) A hammer hitting a block of rubber (D) An explosion on the moon 18. A candle is placed before a thick plane mirror. When looked obliquely in the mirror a number of images
are seen from the surface of the plane mirror. Which of the following statements is correct? (A) First image is brightest (B) Second image is brightest (C) Third image is brightest (D) All images are equally bright Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
19.
3
4
On holding a stainless steel spoon near our face, we see (A) Our inverted image on outer side of the spoon (B) Our erect image on inner side of the spoon (C) Our inverted image on inner side of the spoon (D) Our laterally inverted image on inner side of the spoon
20. During a thunderstorm, an observer can see lightning before hearing its thunder. Why does he see
lightning before he hear thunder ? (A) Sound travels slower than light. (B) Sound needs a medium to travel through. (C) Sound cannot reflect off surfaces as easily as light. (D) Sound is not processed by the brain as fast as light.
21. The given graph illustrates the motion of an object.
Which feature of the graph represent the distance travelled by the object moving at a constant speed?
(A) Area S
(B) Area S + area T
(C) Area T
(D) The gradient at point X
22. Sonic vibrations were sent down from a ship return after 2 seconds. What is the depth of the sea,
if the speed of sound in water is 1.5 km s–1 ? (A) 150 m (B) 3 km
(C) 1.5 km
(D) 750 m
23. Which of the following planets can be seen with naked eye ? (A) Mercury, Venus, Mars, Jupiter (B) Mars, Jupiter, Uranus, Neptune (C) Mercury, Venus, Uranus, Neptune (D) Mercury, Mars, Jupiter, Neptune 24. A cook makes a pudding as shown.
The pudding is placed in a very hot oven until the top of the egg whites turns brown. It is then removed from the oven.
Why does the ice cream stay cold?
(A) (B) (C) (D)
Air is a good conductor of heat and conducts the heat away from the ice cream. Air is a poor conductor of heat and stops the heat from reaching the ice cream. The metal dish is a good conductor of heat and conducts the heat away from the ice cream. The metal dish is a poor conductor of heat and stops the heat from reaching the ice cream.
25. Read the given statements and mark the correct option.
Statement 1 : When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction.
Statement 2 : The frictional force acts only when the bodies are in contact. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false and statement 2 is true.
26. A copper disc has a circular hole drilled in it so that it can act as a washer for a nut and bolt. If this washer is heated equally all over, which of the given options will be true? Circumference of inner hole Circumference of washer (A) Remains constant Increases (B) Decreases Increases (C) Increases Decreases (D) Increases Increases Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
4
5
27. Which of the following cannot be charged easily by friction? (A) A plastic scale (B) A woollen cloth (C) An inflated balloon
(D) A copper rod
28. Three students stand 2 m apart in front of a plane mirror that is 3 m long. Student Y is standing at the mid-point of the mirror.
How many student(s) can see the images of the other two? (A) 0 (B) 1 (C) 2 (D) 3
29. A car driver took a total of two hours to make a journey of 75 km. He had a coffee break of half an hour and spent a quarter of an hour stationary in a traffic jam. What was his average speed during the journey? (A) 38 km h–1 (B) 50 km h–1 (C) 60 km h–1 (D) 75 km h–1 30. Taking one light year equal to 9.4 × 10 15 m and one day equal to 86400 s, what will be the speed of light in light year per day if the speed of light in m s –1 is 3 × 108 ? (C) 2.75 × 103 ly day–1 (D) 3.79 × 103 ly day–1 (A) 2.75 × 10–3 ly day–1 (B) 3.75 × 10–3 ly day–1 31. Sudha took a small amount of sulphur in deflagrating spoon and heated it over a burner. As soon as it started burning she put it in a gas jar and covered with a lid. After sulphur stopped burning she added a small amount of water in it and dissolved the gas in water by shaking it. She then tested the solution with red and blue litmus paper. What did she observe?
(A) In the solution the blue litmus paper turned red.
(B) In the solution the red litmus paper turned blue.
(C) There was no change in the colour of litmus paper.
(D) Blue litmus paper turned red and red litmus paper turned blue.
32. The given diagrams show the reactions of three metals with dilute hydrochloric acid.
What are metals P, Q and R? P Q R
(A) Copper
Magnesium Zinc
(B) Copper
Zinc
(C) Magnesium Zinc
(D) Zinc
Bubbles of hydrogen
Dilute hydrochloric acid Copper
Magnesium
Magnesium Copper
Dilute hydrochloric acid
Metal P
Dilute hydrochloric acid Metal Q
33. Ramesh mixed some iron filings with sulphur powder in a China dish. In another dish he mixed iron filings and sulphur powder and heated the mixture. Which of his observations is not correct? (A) Dish X shows a physical change while dish Y shows a chemical change. (B) In dish X sulphur powder and iron filings can be seen separately. (C) In dish Y a new substance is formed on heating the mixture. (D) The change which has taken place in dish Y is reversible. 34.
Given below are few statements. I. When rubbed on fingers, bases give a soapy feeling. II. The salt produced in neutralisation reaction may be acidic, basic or neutral. III. Antacids are acids used to treat acidity and indigestion. Select the correct option. (A) Only I is correct. (B) Only I and II are correct. (C) Only I and III are correct. (D) All I, II and III are correct. Copyright©2015. Science Olympiad Foundation (SOF)
Metal R
15th NSO - SET A
5
6
35. Few characteristics of three fuels X, Y and Z are given below. X
Y
Z
Not easily stored or Can be stored in tanks and Can be stored in tanks and transported
transported through pipes
transported through pipes
Extremely polluting
Produce almost no pollutants
Moderately polluting
Identify X, Y and Z respectively.
(A) LPG, Biogas, Coal (C) Petroleum, LPG, Coal
(B) Coal, Natural gas, Petroleum (D) Natural gas, Cow dung cake, LPG
36. Three experiments to investigate the reactivities of three metals are shown. Chromium
Aqueous nickel sulphate
Result :
Manganese
Chromium
Aqueous nickel sulphate
Nickel displaced
Aqueous manganese sulphate
Nickel displaced
Manganese not displaced
What is the correct order of reactivity (most reactive → least reactive) for these three metals? (A) Chromium, Manganese, Nickel (B) Manganese, Chromium, Nickel (C) Manganese, Nickel, Chromium (D) Nickel, Chromium, Manganese
37. Four experiments on rusting are shown below.
Which two experiments can be used to show that air is needed for iron to rust? (A) 1 and 3 (B) 1 and 4 (C) 2 and 3 (D) 2 and 4
38.
If Raman opened the air-hole of a bunsen burner fully and lighted the burner, he will get ______. (A) A luminous flame which is orange-yellow in colour. (B) A non-luminous flame which is pale blue in colour. (C) A flame that strikes back which is thin blue or green-yellow in colour. (D) A smoky flame which gives off a lot of soot.
39. Select the correct option which on rearranging gives the term for the ground-water stored between
layers of hard rock below the water table. (A) Duclos (B) Refquai
(C) Ragclei
(D) Pwmas
40. Observe the given apparatus carefully showing an activity performed to compare the carbon dioxide content of inhaled and exhaled air. What would be the observation for T 1 and T2 test tubes and its
correct (A) (B) (C) (D)
explanation? [(+) indicates milky colouration in limewater] T2 Explanation T 1 +++ ++ CO2 content is a little higher in inhaled air ++++ + CO2 content is considerably higher in inhaled air + ++++ CO2 content is considerably higher in exhaled air ++ ++ CO2 content is same in both inhaled and exhaled air Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
6
7
41. A schematic representation of the blood circulation is given. Which circulatory parts are incorrectly placed in it?
(A) Right atrium and right ventricle
(B) Left atrium and left ventricle
(C) Pulmonary artery and pulmonary veins
(D) Aorta and vena cava
42. The given figure shows different layers of a forest labelled as W, X, Y and Z. Which layer is the habitat of many animal species like monkeys, orangutans, toucans and sloths as there is plenty of food available?
(A) W
(B) X
(C) Y
(D) Z
43. Namita’s mother does not allow her to lie on the abdomen immediately after having food. What
could most likely be the reason for this? (A) In stomach, food gets processed into a thick liquid called chyme. (B) Peristaltic movement gets affected throughout the digestive tract especially small intestine where digestion and absorption chiefly occurs, hence food does not properly mix with enzymes and stays undigested. (C) The small intestine, on compression, releases intestinal juices which restrict the action of digestive enzymes in the small intestine. (D) The peristaltic movement gets affected throughout the digestive tract especially large intestine where poor motility may result in greater absorption of water and thereby may cause diarrhoea.
44. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Scouring (i) Wool fibres are passed through rollers to straighten the fibres. (b) Shearing (ii) Unwinding silk fibres from a cocoon. (c) Reeling (iii) The fleece of the sheep alongwith a thin layer of skin is removed. (d) Carding (iv) Stained, damaged or inferior wool is removed. (v) Sheared hair are washed thoroughly to remove the impurities. (A) (a) - (iv), (b) - (iii), (c) - (v), (d) - (i) (B) (a) - (v), (b) - (iii), (c) - (ii), (d) - (i) (C) (a) - (v), (b) - (iii), (c) - (iv), (d) - (i) (D) (a) - (iii), (b) - (ii), (c) - (v), (d) - (iv) 45. The given figure shows an irrigation method used in agricultural practice.
Which of the following is correct regarding this irrigation method ? (A) It is the best technique for watering fruit plants, gardens and trees. (B) It is a boon in regions where availability of water is poor. (C) The method provides water to the plants drop by drop at their roots. (D) All of these.
46. Latika observed her grandmother adding lots of salt on unripe mangoes to prepare pickles. Her
grandmother also added excess of oil in the pickle jar. What could be the reason for it? (A) Salt prevents growth of microorganisms by retaining moisture in the food item and oil provides an environment in which microorganisms cannot grow. (B) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil provides an environment in which microorganisms cannot grow. (C) Salt prevents growth of microorganisms by retaining moisture in the food item and oil prevents their growth by forcing out water from them by osmosis. (D) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil prevents their growth by retaining moisture in the food item. Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET A
47.
7
8
Look at the given cell carefully. Identify the function of the part labelled ‘Y’. (A) It controls the movement of materials in and out of the cell. (B) It controls all the activities of the cell. (C) It contains many cell parts. (D) It provides protection to the cell.
48. Match Column-I with Column-II and select the correct option from the codes given below.
(a) (b) (c) (d) (e) (A) (C)
Column-I Jim Corbett National Park (i) Kanha National Park (ii) Kaziranga Wildlife Sanctuary (iii) Bandipur Sanctuary (iv) Mudumalai Sanctuary (v) (a)- (i), (b)- (iii), (c)- (iv), (d)- (ii), (e)- (v) (B) (a)- (iv), (b)- (v), (c)- (i), (d)- (iii), (e)- (ii) (D)
Column-II Karnataka Madhya Pradesh Tamil Nadu Uttaranchal Assam (a)- (v), (b)- (iv), (c)- (ii), (d)- (i), (e)- (iii) (a)- (iv), (b)- (ii), (c)- (v), (d)- (i), (e)- (iii)
49. Read the given statements and select the correct option.
Statement 1 : Aquatic animals produce large number of eggs and sperms necessary to ensure
Statement 2 : The eggs swim in water with the help of cilia, and fertilize the sperms. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Both statements 1 and 2 are false.
50.
Which of these is a behavioral adaptation? (A) A hognose snake pretends as dead to trick the predator. (B) A frog’s light-coloured belly makes it harder for a predatory fish to see it against sunlight on the water surface. (C) The scarlet king snake looks very much like the poisonous coral snake. (D) A treehopper on a leaf or twig resembles a thorn.
external fertilization.
SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
Class 8 15th
SET B Year 2012
Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET B
1
Mental ability 1.
Five cities A, B, C, D and E are famous for their lovely gardens, fancy jewellery, educational institutes, blue pottery and scents but not in the same order and one city is famous for only one feature.
(i) A and C are neither educational centres nor have gardens.
(ii) B and E are not famous for jewellery or pottery.
(iii) Scents and jewellery have nothing to do with A.
(iv) D and E are not famous for gardens and jewellery.
(v) D is not famous for educational institutes.
City E is famous for which of the following features? (A) Jewellery (B) Educational institutes (C) Scents
2. A train at a uniform speed covers a distance of 350 km in 3
covered in 5 hours. (A) 100 km
3. The value of (A) 2.03
3
(B) 500 km
(D) Gardens
1 hours. Find the distance the train 2
(C) 400 km
0.008 + 0.64 + 4 6.5536 + 0.0009 is ______. (B) 2.63 (C) 2.36
(D) 680 km
(D) 2.13
4. It is estimated that by 2070 the population of the world will be 1.03 × 10 10. If 1.03 × 1010 = k billion. Find the value of k. (A) 1.03 (B) 10.3
(C) 103.0
(D) 1030.0
5. A die is thrown. Find the probability of getting a prime number. 1 2
(B)
2 3
(C)
1 3
(D)
1 4
(A)
6.
If in the word 'ELECTROCARDIOGRAPH' the first half of the letters are reversed, second letter from left end is then prefixed and finally 'S' is suffixed, then the letter exactly in the middle
is ____. (A) L
7.
Which of the following statements is incorrect about a KITE? (A) It is a quadrilateral with exactly two pairs of equal consecutive sides. (B) The diagonals are perpendicular to one another. (C) One of the diagonals trisects the other. (D) None of these
(B) R
(C) D
(D) E
8. A clock seen through a mirror shows quarter to three. The correct time shown by the clock is
______. (A) 8 : 15
(B) 9 : 12
(C) 8 : 17
(D) 9 : 15
9. If a man left one-third of his money to his daughter, one-fourth to his son and the remaining
` 20,000 to his wife, then the money man has left is ______. (A) ` 36,000 (B) ` 48,000 (C) ` 28,000
(D) ` 54,000
10. A trader sells two articles, one at a loss of 10% and another at a profit of 15% but finally there is no loss or gain. If the total sale price of these two articles is ` 30,000, then the difference between
their cost prices is ____. (A) ` 5000 (B) ` 6000
(C) ` 7500
Copyright©2015. Science Olympiad Foundation (SOF)
(D) None of these
15th NSO - SET B
2
11. Which of the following pairs is not correctly matched?
(A) (B) (C) (D)
Geometrical objects Number of vertices Triangular prism 4 Pyramid with rectangular base 5 Cube 6 Triangle 3
12. Select a figure which will continue the same series as established by the given five Problem Figures.
(A)
(B)
(C)
(D)
13. If the given pie chart shows the spendings of a country on various sports during a particular year, then the per cent of the total spendings
spent on tennis is _____. 1 (A) 12 % 2 1 (B) 22 % 2 (C) 25% (D) 45%
14. Abhinav purchased a tracksuit for ` 2400 cash or for ` 1000 cash down payments and two monthly
installments of ` 800 each. The rate of interest is ______. (A) 75% (B) 120% (C) 50%
(D) None of these
15. Three cubes each of edge 3 cm long are placed together as shown in the figure. The surface area
m
3 cm
3c
of the cuboid so formed is _____. (A) 182 sq. cm (B) 162 sq. cm (C) 126 sq. cm (D) None of these
3 cm
3 cm
3 cm
science 16.
Read the given statements and select the correct option. Statement 1 : The velocity of sound decreases with increase in humidity. Statement 2 : The velocity of sound depends upon the density of medium. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true.
17. The given graph shows the position of a particle moving along the x-axis as a function of time.
Select the correct statement about the graph. (A) The particle has come to rest 6 times during its motion. (B) The maximum speed is at t = 6 s. (C) The velocity remains positive for t = 0 to t = 6 s. (D) The average velocity for the total period shown is negative. Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET B
3
18. Match Column-I with Column-II and select the correct option from the codes given below.
Column-I Column-II (a) A child running to catch the school bus (i) Force can make a stationary object to move (b) A man blowing a balloon (ii) Force can stop a moving object (c) A woman pushing a table (iii) Force can change the shape of an object (d) A cricketer catching a ball (iv) Force can make an object move faster (A) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii) (B) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv) (C) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (D) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
19. The diagram shows a mercury barometer. What happens to the column
height h when the mercury barometer is taken up in a balloon? (A) It decreases, because atmospheric pressure increases with height. (B) It decreases, because atmospheric pressure decreases with height. (C) It increases, because atmospheric pressure increases with height. (D) It increases, because atmospheric pressure decreases with height.
h
21. The graph shows the temperature changes when wax cools from liquid to solid. At which labelled point would the wax be a mixture
of solid and liquid? (A) P (C) R
(B) Q (D) S
Temperature (°C)
20. The light reflected by a plane mirror may form a real image ________. (A) If the rays incident on the mirror are converging (B) If the object is placed very close to the mirror (C) If the rays incident on the mirror are diverging (D) Under no circumstances P Q
R
S T
Time (s)
22. Consider a vehicle moving on a horizontal road towards east. Neglect any force by the air, the
frictional forces on the vehicle by the road _________. (A) Is towards east if the vehicle is accelerating (B) Must be towards east (C) Must be towards west (D) None of these
23. Two plane mirrors are placed parallel to each other as shown in the figure. There is an object placed at O between the mirrors at 5 cm from the mirror M2. What
is the distance of third image from the mirror M2? (A) 5 cm (B) 15 cm (C) 25 cm (D) 35 cm
24. A wooden block floats in a beaker of water. The block is near the wall of the beaker as shown in the figure. If P1, P2 and P3 be the pressure at the three
points A, B and C respectively at the bottom of the container, then (B) P1 = P2 < P3 (C) P1 > P2 > P3 (A) P1 = P2 > P3
(D) P2 = P3 > P1
25. During the electrolysis of dilute sulphuric acid, it splits into ________. (A) Oxygen ions and hydrogen ions (B) Oxygen ions, hydrogen ions and sulphate ions (C) Oxygen ions and sulphate ions (D) Hydrogen ions and sulphate ions 26. In an experiment to measure the speed of sound in air, a boy stands 40 m from a wall and bangs two pieces of wood together. At the instant he hears the echo, he bangs them together again. He does this activity 50 times. The time taken for 50 bangs is 12 s. Which calculation gives the speed
of sound in air? 12 (A) 40 × 50
(B)
40 × 50 12
(C) 40 × 2 × 50 12
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(D)
40 × 2 × 12 50
15th NSO - SET B
4
27. A boy is moving along a circular track. He covers one complete round of 30 m in 30 s. The average speed and average velocity of the boy in m s–1 is respectively ______.
(A) 1, 0
(B) 0, 1
(C) 1, 1
(D) 0, 0
28. Match Column-I with Column-II and select the correct option from codes given below.
Column-I
Column-II
(a) Insulator
(i) Prevents rusting
(b) Conductor
(ii) Pure water
(c) Electroplating
(iii) Copper wire
(A) (a)-(i), (b)-(ii), (c)-(iii)
(B) (a)-(iii), (b)-(i), (c)-(ii)
(C) (a)-(i), (b)-(iii), (c)-(ii)
(D) (a)-(ii), (b)-(iii), (c)-(i)
29. Comets spend most of their time _________. (A) Far away from the sun (C) Very close to sun 30. The (A) (B) (C) (D)
(B) Close to one planet or the other (D) Very close to earth
length of the shadow will be longest when the _________. Angle between the source of light and the object is 45° Source of light and the object are parallel to each other Source of light and the object are perpendicular to each other Angle between the source of light and the object is 60°
31. A piece of calcium metal is placed in water. A reaction takes place in which bubbles of hydrogen gas are seen. After the reaction stops, the solution is tested for its colour, temperature and action
with litmus solution. Select the correct observation. (A) The solution is hot, milky white and turns red litmus blue. (B) The solution is hot, colourless and turns blue litmus red. (C) The solution is cold, milky and turns blue litmus red. (D) The solution is cold, colourless and does not change the colour of litmus.
32. A student investigated the reactivity of four metals – iron, copper, zinc and an unknown metal X. He arranged three experimental set up as shown in the diagram. Iron
Zinc
Solution containing aqueous copper (II) ions Experiment 1
Metal X
Solution containing aqueous iron (II) ions Experiment 2
Solution containing aqueous zinc (II) ions Experiment 3
The student observes that reaction occurred in all the three experiments. Identify the metal X. (A) Cu (B) Mg (C) Fe (D) Au
33. Four test-tubes were set up as shown in the following options. Each piece of iron was protected on one side by coating of different materials. In which test-tube is the iron least likely to rust? Water
(A)
Water
(B)
Iron
Iron
Grease
Water
(C)
(D)
Iron
Paint
Plastic
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15th NSO - SET B
5
34. Match Column-I with Column-II and select the correct option from the codes given below. (i) (ii) (iii) (iv) (A)
Column-I Production of biogas from animal waste (p) Dissolving sugar in water to make solution (q) Depositing a layer of zinc on iron (r) Mixing of iron with carbon and metals (s) like chromium or nickel (i)-p, (ii)-q, (iii)-r, (iv)-s (B) (i)-r, (ii)-q, (iii)-s, (iv)-p (C)
Column-II Stainless steel Physical change Chemical change Galvanisation (i)-q, (ii)-r, (iii)-s, (iv)-p (D) (i)-s, (ii)-r, (iii)-p, (iv)-q
35. Which of the following statements are true? I. Yellow flames are ideal for heating. II. The substances which vapourise during burning, give flames. III. Luminous zone contains unburnt carbon particles. IV. The non-luminous zone has highest temperature. (A) I, II and III (B) I, II and IV (C) II, III and IV
(D) I, III and IV
36. Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively?
(A) Carbon dioxide and hydrogen
(B) Hydrogen and carbon dioxide
(C) Oxygen and carbon dioxide
(D) Carbon dioxide and oxygen
37.
Which of the following is an incorrect match? (A) An oily liquid formed when coal is heated in absence of air - Coal tar (B) A gas found along with petroleum in reservoirs under the ground - Natural gas (C) A thick black liquid found trapped in underground rocks - Petroleum (D) A residue left behind when destructive distillation of coal is carried out - Charcoal
38. Match Column-I with Column-II and select the correct option from the codes given below.
Column-I
(i) A synthetic fibre obtained from cellulose
(ii) A synthetic fibre used for making woollen clothes
(q) Nylon
(iii) A thermosetting plastic
(r) Rayon
(iv) This polymer is used for making ropes and fishing nets
(s) Bakelite
(A) (i)-(p); (ii)-(q); (iii)-(r); (iv)-(s)
(B) (i)-(r); (ii)-(p); (iii)-(s); (iv)-(q)
(C) (i)-(s); (ii)-(r); (iii)-(q); (iv)-(p)
(D) (i)-(p); (ii)-(r); (iii)-(q); (iv)-(s)
Column-II
(p) Acrylic
39. Which of the following is correct regarding
the (A) (B) (C) (D)
given Venn diagram? X is Venus fly trap, Y is mistletoe X is Cuscuta, Y is Monotropa X is mistletoe, Y is Cuscuta X is mistletoe, Y is mushroom
40. Sakshi wants to test the quality of her dupatta. She pulled a small strand of yarn from the dupatta
and burned it. It smelled like a burning plastic. She inferred that the dupatta is made of ______. (A) Pure wool (B) Nylon (C) Pure silk (D) Cotton Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET B 41.
6
Read the given statements. (i) Ingestion in Hydra occurs with the help of pseudopodia. (ii) Bile juice is secreted by gall bladder and stored in liver. (iii) In humans, digestion of starch starts in the mouth. (iv) The outer covering of teeth is called enamel and is the hardest substance in human body. (v) Omasum is the largest chamber of ruminant stomach where food is stored. Which of the above statements are incorrect ? (A) (i), (ii) and (v) (B) (iii) and (iv) (C) (ii), (iii) and (iv) (D) (i), (ii) and (iii)
42. Identify P, Q, R, S and T in the given flowchart and select the correct option. P Q R S T (A) Bulb Tuber Rhizome Bryophyllum Spirogyra (B) Stolon Layering Bulb Colocasia Lily (C) Tuber Rhizome Layering Marigold Rose (D) Rhizome Bulb Tuber Spirogyra Bryophyllum 43.
Vegetative propagation in plants P
Q
R
Ginger
Onion
Potato
Fragmentation S
Leaf buds T
Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Phloem (i) Contain respiratory pigment (b) Arteries (ii) Translocation of food in plants (c) Red blood cells (iii) Carry oxygenated blood away from the heart (d) Xylem (iv) Have thin walls (e) Veins (v) Conducts water from roots to leaves (A) a-(v), b-(iv), c-(iii), d- (ii), e-(i) (B) a-(ii), b-(iii), c-(i), d-(v), e-(iv) (C) a-(iii), b-(i), c-(ii), d-(iv), e-(v) (D) a-(iv), b-(v), c-(ii), d-(iii), e-(i)
44. The given diagram shows respiratory system of man.
Which of the following correctly shows the functions of the parts labelled W, X, Y and Z? (A) W - Facilitates movement of air by expansion (B) W - Helps in gaseous and contraction exchange X - Traps dust and helps to filter inhaled air X - Traps dust and helps to filter inhaled air Y - Prevents the wind pipe from collapsing Y - Serves as a common passage for air and food Z - Help in exchange of gases Z - Protect the lungs from damage (C) W - Prevents the wind pipe from (D) W - Facilitates movement of air by collapsing expansion and contraction X - Serves as a common passage for air and food X - Helps in gaseous exchange Y - Helps in upward and downward movement of ribcage Y - Serves as a common passage for food and air Z - Trap dust and help to filter inhaled air Z - Protect the lungs from damage 45. Which of the following on reshuffling gives the term that refers to the process of sowing seeds manually by sprinkling them on soil by hand ? (A) inigtil (B) glnopuihg (C) atnbrdocaigs (D) giownwin 46. The change in number of two species X and Y belonging to the same food chain over a period of time is shown in the given graph. Which of the following best identifies the organisms? X Y (A) Chicken Corn (B) Fox Hen (C) Grass Rabbit (D) Lion Deer Copyright©2015. Science Olympiad Foundation (SOF)
15th NSO - SET B
7
47. Correct the given statements by replacing the underlined words and select the correct option. (i) The viscous fluid present in the nucleus is called cytoplasm. (ii) Vacuoles are rod shaped structures which oxidize food to provide energy. (iii) Mitochondria contain green pigment chlorophyll and take part in photosynthesis. (iv) Lysosomes take part in synthesis of protein. (i) (ii) (iii) (iv) (A) Nucleoplasm Lysosomes Plastids Centrosome (B) Protoplasm Ribosomes Centrosome Golgi bodies (C) Nucleoplasm Mitochondria Chloroplasts Ribosomes (D) Protoplasm Plastids Endoplasmic reticulum Ribosomes 48. Identify X, Y and Z in the given flowchart and select the correct option. X Y Z (A) Pituitary gland TSH Thyroid gland (B) Adrenal gland Adrenaline Hypothalamus (C) Hypothalamus Pituitary gland Parathyroid (D) Hypothalamus TSH Pituitary gland 49. The given pie charts show the composition of three types of soil samples X, Y and Z. Which of the following is correct regarding these? (A) X is unable to hold water or nutrients. (B) Y is used for pot making. (C) Z provides good amount of oxygen to roots for breathing. (D) X is best suited for cultivation. 50. Refer the given flowchart and identify X, Y and Z.
X
Y
Z
(A) Biosphere Reserve Sanctuary
National Park
(B) Biosphere Reserve National Park
Sanctuary
(C) Sanctuary
National Park
Biosphere Reserve
(D) National Park
Biosphere Reserve
Sanctuary
SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
Class 8 16th
SET A Year 2013
Copyright©2015. Science Olympiad Foundation (SOF)
Mental Ability 1. Direction : If p * q = p 2 – q2 p $ q = p 2 + q2 p @ q = pq + p + q If p = 11 and q = 7, then the value of
B.
C.
6.
In a survey, 240 parents of a school were asked about the number of hours spent by their children on their study (including homework) in a day. The data obtained is represented by given pie. chart
From this pie chart, find the number of students in each sector in terms of percentage.
A.
P = 20%, Q = 20%, R = 60%
B.
P = 15%, Q = 60%, R = 25%
C.
P = 15 %, Q = 25 %, R = 60 %
D.
P = 20%, Q = 60%, R = 20%
7.
If P and S interchanges their position & Q and T interchanges their position, then which point is north-west of R ?
[(p * q) @ (p $ q)]
A. C.
2.
The question given below is followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/ are necessary to answer the question:
12492 14292
B. D.
14282 12482
D.
What is the rate of interest p.c.p.a. ? I.
An amount doubles itself in 5 years on simple interest.
II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is ` 400. III. Simple interest earned per annum is ` 2000.
A. B. C. D.
I only II and III only Any two of the three I only or II and III only
3.
If the sum of all 6's is subtracted from the sum of all 9's in the given below series, what will you get?
6 6 9 6 9 9 9 6 6 6 9 6 9 6 6 9 9 6 6 9 9 6 6 6
A. C.
4.
In a zoo, there are rabbits and pigeons. If heads are counted, there are 340 heads and if legs are counted there are 1060 legs. How many pigeons are there?
9 18
B. D.
A. C.
5.
Which of the following is the net of the prism shown below ? (figure is not drawn to scale)
A.
120 180
B. D.
6 27
150 170
P
Q
A.
P
B.
Q
C.
T
D.
S
8.
In the given figure, PQRS is a square and LMNP is a rectangle. A straight line is drawn from L, passes through 'N' meets at R. Side of square is square root of 100. The area of unshaded region is ____ cm2 .
A.
112.5
B.
78
C.
83.3
M
D.
None of these
L
Copyright©2015. Science Olympiad Foundation (SOF)
R S
T
Q
R
N P
S
16th NSO - SET A
2
9.
Which number will complete the number pattern given below?
A.
U 30
B.
C.
X 48
D.
W 46 W 48
13. Find the odd figure out.
A. B.
Q S
C. D.
R T
10. Which of the following statements is INCORRECT?
A.
B.
C.
D.
Rhombus satisfies all the properties of a parallelogram & diagonals are perpendicular to each other. Rectangle satisfies all the properties of a parallelogram. Square satisfies all the properties of a parallelogram, rhombus and a rectangle. In kite, both the diagonals do not bisect each other.
11. If A → E, B → F, C → G and H → L, then how will you code ‘GO AHEAD’?
A. B. C. D.
KS HP KS KS
FLIFH BIFBE GLIGH ELIEH
12. In the given figure, AE = BC and AE || BC and the three sides AB, CD and ED are equal in length. If m∠ A = ( 10404 ) , find ∠BCD.
A.
138°
B.
162°
C.
88°
D.
152°
14. The given figure shows the net of a cube. Which one of the faces is the base of the cube ?
A. B. C. D.
T Q
P T R S
R
S
top P
15. Which of the following options is the correct mirror image of figure (X), if the mirror is placed vertically to the left?
A.
B.
C.
D.
Science 16. A brick of weight 80 N stands upright on the ground as shown in the figure. The pressure exerts on the ground by brick is A.
B.
5 × 10 × 10−4 N m −2 80 80 × 5 × 10–4 N m–2 10
C. D.
80 × 5 × 10−4 80 10 × 5 × 10
−4
N m −2 N m −2
17. Read the given statements and mark the correct option. Statement 1 : It is difficult to move by a cycle along the road with breaks on. Statement 2 : The sliding friction is greater than the rolling friction. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false.
Copyright©2015. Science Olympiad Foundation (SOF)
16th NSO - SET A
3
18. A body is acted upon by a constant force directed towards a fixed point. The magnitude of the force varies inversely as the square of the distance from the fixed point. What is the nature of the path?
A. C.
Straight line Random motion
B. D.
Circle Can't say
A.
19. Shweta observes lightning in her area. She hears the sound 5 s after she observed lighting. How far is she from the place where lightning occurs if speed of sound in air is 330 m s–1.
A. C.
1.65 km 3.65 km
B. D.
2.55 km 4.55 km
20. The figure shows a barrier placed at right angles to a plane mirror with four lamps at position P, Q, R and S. Which lamp can be seen by the observer?
A. C.
P R
B. D.
Q S
21. While playing a violin, in which of the following the vibrations can take place?
A. B. C. D.
The wire only Air only The box only Both the wire and box
22. John carried out an experiment to find out how different surfaces (P, Q, R and S) effect the distance a car travelling at 50 km/h needed to stop once the brakes are applied. The results are shown below: Type of road surfaces Stopping distance (m)
P 18
Q 15
R 19
S 27
Which type of road will provide the most friction for the car to stop?
A. C.
P R
B. D.
Q S
23. Bees which are not carrying honey fly with a flapping frequency of 440 Hz while those which are carrying honey fly with a flapping frequency of 300 Hz. The sound made by bees which are not carrying honey has
A. C.
B.
C.
D.
25. Oxygen can be supplied to a fish tank by bubbling air in to water. The pressure and the volume of the air bubbles while they are rising respectively
A. B. C. D.
Decreases, increases Decreases, decreases Increases, decreases Increases, increases
26. By using a concave mirror, image of a tree is focused on a screen. The distance between the screen and the mirror is
24. An object of weight W is pulled along a rough, horizontal surface by a force X. The force of friction is Y. Which diagram correctly shows the direction of these forces on the object?
A lower pitch A smaller loundness
B. D.
A higher pitch A greater loudness
A.
B.
C.
D.
Equal to twice the focal length of the concave mirror. Equal to one fourth of the focal length of the concave mirror. Equal to half the radius of curvature of the concave mirror. Equal to the radius of curvature of the concave mirror.
27. A ball is dropped from a spacecraft revolving the earth at a height of 100 km. What will happen to the ball?
A.
B.
C. D.
It will continue to move with the same speed along the original orbit of spacecraft. It will move with the same speed, tangentially to the spacecraft. It will go very far in the space. It will fall down to earth gradually.
28. If °C, °F and K are the temperatures on Celsius, Fahrenhit and Kelvin scales. D°C, D°F and DK are the change in temperatures in Celsius, Fahrenheit and Kelvin scale respectively. Which relation among the following is correct? A.
C.
D.
°C ° F K − 273 °C ° F K = = = = B. 9 5 5 5 9 5 ∆°C ∆° F ∆° K = = 5 9 5 ∆°C ∆° F − 32 ∆K − 273 = = 5 9 5
Copyright©2015. Science Olympiad Foundation (SOF)
16th NSO - SET A
4
29. Solve the following riddles by identifying X, Y and Z. X : Your mother loves to cook in the utensils which are coated with me because I make them non-stick. Y : I protect the firemen by coating their uniforms to make them fire resistant. Z : I am a very familiar form of polyester and used for making bottles, utensils, films, etc. X Y Z A. Acrylic, Rayon, Bakelite B. PET, Polythene, Teflon C. Rayon, Bakelite, Melamine D. Teflon, Melamine, PET 30. Mr. Goyal, a science teacher showed the following experimental set up to the students. Which of the following is the correct observation and its explanation?
A.
B.
C.
D.
The paper pan catches fire and the water spills all over the wire mesh because paper is inflammable. The paper pan has a very high ignition temperature so it does not catch fire. The water in the pan absorbs heat from the candle flame and thus prevents the paper to reach the ignition temperature. The paper pan helps the water vapours to condense back to water.
31. Match the column I with column II and choose the correct option using the codes given below.
(a) (b) (c) (d) A. B. C. D.
Column I Used in thermometers (i) Present in fertilisers (ii) Used to disinfect water (iii) Used as an antiseptic (iv) (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
Column II Iodine Mercury Phosphorus Chlorine
32. Petroleum and natural gas are often found together as large deposits deep inside the earth’s crust. What is the correct order in which they are present in the earth?
A. B. C. D.
X Water, Water, Crude oil, Natural gas,
Y Crude oil, Natural gas, Water, Water,
Z Natural gas Crude oil Natural gas Crude oil
33. Fill in the blanks by choosing the correct option. Excessive use of fertilizers makes the soil _______, so it should be treated with _______ like _______. If the soil is _______ then organic matter should be added to it.
A. B. C. D.
Basic, acids, formic acid, acidic Basic, acids, milk of magnesia, neutral Acidic, bases, zinc carbonate, neutral Acidic, bases, slaked lime, basic
34. Study the given figures carefully and identify the types of changes shown.
A.
B.
C.
D.
X and P are physical while Y and Q are chemical changes. X, Y and P are physical changes while Q is a chemical change. X is a physical change while Y, P and Q are chemical changes. All are physical changes.
35. Ritu was given four test tubes containing different solutions as shown in the figure.
Choose the incorrect option. A. 1 and 2 turn blue litmus to red. B. 1 and 4 turn China rose indicator to green. C. Phenolphthalein remains colourless with 2 and 3. D. 4 turns turmeric solution to red.
Copyright©2015. Science Olympiad Foundation (SOF)
16th NSO - SET A
5
36. Priya wants to carry out a fair test to find out how fast water can pass through four different kinds of soil. She sets up the experiment as shown in the figure below. She uses a stopwatch to measure the time taken for water to pass through each kind of the soil.
She records her findings in the table below. Kind of soil P Time taken (in seconds) 33
Q 23
R 45
S 18
Which type of soil is suitable to grow lentils? A. S B. P C. Q D. R
37. Which of the following is incorrect for the organism as shown? A. It lives in extremely cold conditions where the water is always below the freezing temperature. B. Its body is streamlined, feet are webbed and is excellent swimmer. C. It is a solitary animal who live alone near the sea. D. It huddles together in groups to keep each other warm.
A.
B.
C.
D.
He should put more water in the field to provide adequate irrigation. He should leave field free for one or more season. He should grow legume crop in next season to replenish nitrogen in the soil. Both B and C
40. A person on entering a dark room finds a snake. Due to fear his body becomes stiff and the heart starts to beat fast. Which of the following is likely to happen to his hormonal control system as shown? A. Secretion of adrenaline from part labelled Q. B. Secretion of thyroxine from part labelled P. C. Secretion of adrenaline from part labelled R. D. Secretion of TSH from part labelled Q. 41. Study the given flow chart carefully.
38. After hearing Mr. Saxena's countless and justified explanations on his problem, the doctor said, "Okay! in that case, your request for permanent contraception is granted. I shall sterilize you on the 18th December 2013. You will have all your male characteristics intact, so don't worry."
42. Study the given figures and select the correct statements regarding these.
Which of the following procedure Mr. Saxena will be going through? A. in vitro fertilization B. His vas deferens will be cut and tied C. His seminal vesicle will be removed D. His prostate gland will be removed and testes will be cut and tied.
39. Ramu, a farmer, grew wheat on the same field for many years. He noticed that the yield of wheat is decreasing every year. What do you think he should do to rectify this?
Which of these is/are incorrect in the above flow chart? A. Asiatic lion and lion tailed macaque B. Vulnerable species C. Dodo D. Golden cat and chinkara deer
(i) Figure X represents a unicellular alga. (ii) Figure Y represents a parasitic protozoan. (iii) Organism in figure X cannot synthesize its own food.
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16th NSO - SET A
6
(iv) Organism in figure Y shows mixotrophic mode of nutrition. A. (i), (ii), (iii) and (iv) B. (i) and (iv) C. (i), (iii) and (iv) D. (ii) and (iii)
43. Rita wants to study the process of respiration in animals. She sets up an experiment using five insects of the same species and size as shown in the setup below. She provides the insects with food and water above S which removes the end product of respiration.
44. Select the correct sequence of words to fill up the blanks in the given paragraph.
Wool is the _____ of a sheep. It is removed from the sheep by a process called ______. When it goes to mill, wool is cleaned to remove dirt and grease by a process known as ________. Clean wool is _______ to remove tangles. Long and soft wool strands are spun into _____ which is woven on looms.
A. B. C. D.
Hair, Shearing, Carding, Scoured, Yarn Fleece, Scouring, Shearing, Carded, Yarn Hair, Shearing, Scouring, Carded, Fabric Fleece, Shearing, Scouring, Carded, Yarn
45. Refer the given figures and select the incorrect option.
Which of the following is correct regarding the given set-up?
A. B.
C.
D.
S is KOH and is used to remove CO2. By measuring the height moved by red-coloured water in glass tube, Rita can measure the volume of air used by the insects for respiration. Rita should set-up a control by preparing the same set-up without the insects. Both A and B
A. B. C. D.
P reproduces vegetatively by underground stem called rhizome. Q reproduces asexually by buds on its leaves. R reproduces by the process of fragmentation. S reproduces by the process of budding.
Achievers Section Direction (Q. 46 & 47) : Refer the given passage and answer the following questions. The graph in the figure shows the position of a body at different times.
48. Consider the following statements (a – d) each with one or two blanks. (a) At puberty the (1) begins to grow in boys, which protrudes out in the throat region as Adam's apple and marks the (2) of adolescence. (b) Every cell has (3) lifespan. (c) On reaching the uterus, the embryo attaches to the wall of uterus by (4) . This is called (5) .
46. What is the speed of the body as it moves from A to B? A. 1 cm/s B. 2 cm/s C. 3 cm/s D 4 cm/s 47. What is the speed of the body as it moves from C to D? A. 1 cm/s B. 4 cm/s C. 8 cm/s D. 2 cm/s
(d) Some factories use (6) to remove particles of solids such as carbon dioxide from waste gases before they are let out into the atmosphere.
A.
B. C. D.
2-End, 4-Umbilical cord, 5-Pregnancy, 6-Catalytic converter 1-Larynx, 3-Indefinite, 5-Implantation 1-Pharynx, 2-Start, 4-Umbilical cord 1-Larynx, 3-Definite, 4-Placenta, 6-Electrostatic precipitators
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16th NSO - SET A
7
49. Kunal performed an activity using the shown experimental set up.
C. D.
P is CO2 , Q turns lime water milky. P is CO2 gas, Q is hydrogen gas.
50. As proved by many studies greenhouse effect is rapidly increasing because of increase in concentration of carbon dioxide. In the given graph the increase in carbon dioxide concentration is shown. What could be X corresponding to it?
The balloon tied on bottle 1 rose and float away while that on bottle 2 could not.
Choose the correct statement about the gases filled in the two balloons.
A.
B.
P burns with a pop sound and Q is hydrogen gas. P is hydrogen gas, Q turns lime water milky.
(i) (ii) (iii) (iv) A. C.
Rate of photosynthesis in plants pH of the oceans Water level of ocean Average global temperature of earth (i) and (iii) B. (ii) and (iv) (ii) only D. (iv) only
SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
Class 8 16th
SET B Year 2013
Copyright©2015. Science Olympiad Foundation (SOF)
Mental Ability 1. 2.
Which of the following statements is true? A. Integers are rational numbers but fractions are not. B. Fractions are rational numbers but integers are not. C. Neither integers nor fractions are rational numbers. D. Integers and fractions are rational numbers.
A direction pole was situated on the crossing. Due to an accident the pole turned in such a manner that the pointer which was showing East, started showing South. One traveller went to the wrong direction thinking it to be West. In what direction actually he was travelling? A. East B. West C. North D. South
3.
If 3a = 4b = 6c and a + b + c = 27 29 , then a 2 + b 2 + c 2 is
A.
3 29
B.
C.
87
D.
4.
There are 23 steps to reach a temple. On descending from the temple Mohit takes two steps in the same time. Rohit ascends one step. If they start to work simultaneously, at which step will they meet each other? A. 11th B. 9th C. 10th D. None of these
5.
81 9 29 2
Two positions of a cubic block are given below, each face having small triangles. If there is a triangle at the bottom, how many triangles will be there on the top face?
7.
The line graph shows the number of sandwiches sold each day at a shop. If the shop earned a profit of 60 paise for every sandwich sold, how much profit did the shop earn in one week?
A. C.
8.
In the given question, which number will replace the question mark? A. 2 B. 3 C. 4 D. 5
9.
` 636 ` 742
B. D.
` 1060 ` 128 18 24
32
12 14
16
3
4
72 112 128
Direction : There is a question followed by three statements I, II and III. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. In how many days can P and Q working together to complete a job? I. P alone can complete the job in 30 days. II. Q alone can complete the job in 40 days. III. Q takes 10 days more than P to complete the job. A. I and II only B. II and III only C. I and III only D. Any two of the three
A.
4
B.
3
C.
2
10. The given figure shows two rectangles.
D.
5
6.
The figure shows a cuboid with a square face. The perimeter of this square face is 20 cm. The volume of the cuboid is 525 cm3. Find the length of p. A. 50 cm B. 102 cm C. 20 cm
D.
21 cm
?
If q is four times as much p and q is twice as much as r, what is the value of r? A. 18° B. 54° C. 36° D. 72°
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16th NSO - SET B
2
11. What will the solid look like if viewed from the top?
A.
C.
13. Consider the figures X, Y and Z showing a sheet of paper folded and punched as shown in figures. Select the figure from the options which will most closely resemble the unfolded position of figure (Z).
B.
D.
12. Which of the following options will continue the series in the problem figure?
A.
B.
C.
D.
A.
B.
C.
D.
14. If = 34.03 kg and = 39.590 kg, then = ? A. 121.42 B. C. 45.56 D.
55.56 65.89
15. The given cuboid is made up of white unit cubes. The outside of the cuboid is then painted blue. How many unit cubes are not painted blue on any of their surfaces? A. 4 B. 8 C. 12 D. 16
Science 16. Two blocks A and B are released at the top of a rough inclined plane so that A slides along the plane and B falls down freely. Which will have higher velocity on reaching the ground? A. A B. B C. Both will reach the ground with same velocity D. It depends on the coefficient of friction 17. Two plane mirrors are inclined to each other at an angle of 60°. If a ray of light incident on the first mirror is parallel to the second mirror, it is reflected from the second mirror
A.
Perpendicular to the first mirror
B.
Parallel to the first mirror
C. D.
Parallel to the second mirror Perpendicular to the second mirror.
18. A piece of ice is floating in a beaker containing water. When ice melts, the temperature falls from 20°C to 4°C and the level of water A. Remains unchanged B. Falls C. Rises D. Change erratically 19. Two wave pulses travel in opposite directions on a string and approach each other. The shape of one pulse is inverted with respect to the other. A. The pulse will collide with each other and vanish after collision. B. The pulses will reflect each other, that is pulse going towards right will finally move towards left and vice versa. C. The pulses will pass through each other but their shapes will be modified. D. The pulses will pass through each other without any change.
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16th NSO - SET B
3
20. John carried out an experiment to find out how different surfaces (P, Q, R and S) effect the distance a car travelling at 50 km h–1 needed to stop once the brakes are applied. The results are shown below
Which type of road will provide the most friction for the car to stop? A. P B. Q C. R D. S
21. A particle follows a path XY as shown in the given figure. If the radius of semi-circular path is 2 cm then the approximate value of distance covered and displacement of the particle are respectively.
A. C.
20 cm and 10 cm 20 cm and 60 cm
B. D.
30 cm and 23 cm 63 cm and 40 cm
22. Read the following statements and select the correct option. Statement-1 : A convex mirror is preferred over a plane mirror in vehicles to observe traffic coming from behind. Statement-2 : Images formed by convex mirror are erect and diminished in size. A. Both statements-1 and 2 are true and statement-2 is the correct explanation of statement-1. B. Both statements-1 and 2 are true but statement-2 is not the correct explanation of statement-1. C. Statement-1 is true and statement-2 is false. D. Both statements-1 and 2 are false. 23. Lunar eclipse occurs when earth comes in between sun and the moon. Solar eclipse occurs when moon comes in between sun and earth. This suggests that A. Both eclipses occur on a new moon day. B. Solar eclipse occurs on a new moon day. C. Lunar eclipse occurs on a new moon day. D. Both eclipses occur on a full moon day. 24. At particular time of a day, the ratio of height of an object and the length of it’s shadow is x. Using this, calculate the height of a tree if the length of the shadow of tree is L. x B. x × L A. L
C.
x + L
D.
L–x
25. The given figure shows a beaker containing a solution of copper sulphate and two carbon electrodes.
A battery is placed next to it. In order that the electrode E be plated with copper ____. A. E must be connected to H and F to G B. E must be connected to F and H to G C. E must be connected to G and F to H D. E and F must be connected to G
26. The temperature of the substance remains constant when it is melting and boiling though some quantity of heat is supplied. What happens to this energy? A. It is dissipated as sound energy. B. It is consumed to increase the energy of the molecules. C. It is used to change the state of the substance. D. It is still an unsolved problem in science. 27. Match Column-I with Column-II and mark the correct option. Column-I Column-II (a) Richter scale (i) Electric Charge (b) Electroscope (ii) Amber (c) Resin (iii) Earthquake (d) Electric current (iv) Flow of charges A. a-(iv), b-(ii), c-(i), d-(iii) B. a-(iii), b-(i), c-(ii), d-(iv) C. a-(i), b-(iii), c-(iv), d-(ii) D. a-(ii), b-(iv), c-(i), d-(iii) 28. Which graph shows the relationship between the pressure and volume of a fixed mass of a gas in a container at constant temperature?
A.
B.
C.
D.
29. Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula________. A. Fe3O4 B. Fe2O3 C. FeO D. Fe(OH)2
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16th NSO - SET B
4
30. Raman was given four slips with one problem written on each slip. Four bottles labelled from 1 to 4 were kept in front of him. a. Excessive use of 1. Magnesium fertilizers in the soil hydroxide b. Too basic soil 2. Zinc carbonate c. Ant bite 3. Organic matter d. Indigestion 4. Calcium hydroxide Identify the bottles that he should pick as remedy for each of the given problems. A. a-3, b-2, c-4, d-1 B. a-3, b-4, c-1, d-2 C. a-2, b-3, c-1, d-4 D. a-4, b-3, c-2, d-1 31. Ms. Chopra, a science teacher prepared two solutions for practical test as follows: Solution 1 : Dissolved the ash collected after burning the magnesium ribbon in water. Solution 2 : Added dilute sulphuric acid to lime water. She asked a student to test the solutions with China rose indicator and write the change in colour. Choose the correct observation among the following. A. Solution 1 → Red, Solution 2 → Green B. Solution 1 → Green, Solution 2 → Pink C. Solution 1 → Red, Solution 2 → Pink D. Solution 1 → Green, Solution 2 → Green 32. I am a man-made fibre, stronger than a steel wire. Some of my uses are shown in the figures:
II B. D.
Acrylic Rayon
33. Liquid and gaseous fuels have more advantages over solid fuels. Some of the advantages are : (i) Calorific value of liquid and gaseous fuels is higher than the solid fuels. (ii) Liquid and gaseous fuels have higher ignition temperatures than the solid fuels. (iii) Liquid and gaseous fuels are easier to store since solid fuels occupy lot of space.
(iv) Liquid and gaseous fuels burn completely not leaving any residue.
(i), (iii) and (iv) (i), (ii) and (iv)
34. Read the following statements carefully and identify P, Q and R. P : Obtained from petroleum and natural gas and used in the manufacture of man-made plastics. Q : Due to its great commercial importance, it is also called 'black gold'. R : Obtained from natural gas and used in the production of fertilizers. P Q R A. Petrochemicals, Petroleum, Hydrogen gas B. Coke, Coal, Coal tar C. Paraffin wax, Coal tar, Diesel D. Bitumen, Coke, Coal gas 35. Few uses of metals are shown below.
X
I Who am I? A. Polyester C. Nylon
Choose the correct advantages. A. (i), (ii) and (iii) B. C. (ii), (iii) and (iv) D.
Y
Z Identify the properties which are responsible for the uses X, Y and Z respectively. A. Conductivity, Malleability, Ductility B. Ductility, Malleability, Sonorous C. Sonorous, Malleability, Ductility D. Malleability, Ductility, Sonorous
36. Match Column I having characteristics of gas exchange surfaces with Column-II having their respective purposes and select the correct option. Column-I Column-II (a) Moist surface (i) Keeps high concentration gradient of gases (b) Single layer (ii) Allows faster diffusion of epithelial of gases cells (c) Well ventilated (iii) Allows gases to dissolve (d) Large surface (iv) Allows larger amount of area gases to diffuse A. a-(iii), b-(iv), c-(ii), d-(i) B. a-(iii), b-(ii), c-(i), d-(iv) C. a-(i), b-(ii), c-(iii), d-(iv) D. a-(ii), b-(iv), c-(iii), d-(i)
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16th NSO - SET B
5
37.
The given figure shows a part of digestive system. Identify it and select its main function. A. Gall bladder : Carries the digested food to all parts of the body. B. Part of pancreas : Produces digestive juices to digest the food in small intestine. C. Villus : Makes a large surface area for the effective absorption of digested food. D. Oesophagus: Helps the movement of undigested food into the large intestine.
38. Read the following statements and select the correct option. Statement 1 : Wind pollinated flowers need to produce more quantities of pollen grains. Statement 2 : Seeds from cross pollinated flowers produce weaker and less healthy plants. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. 39.
Which of these can be found in a tropical rainforest? A. Sloth and Lion-tailed macaque B. Camels and Cacti C. Lemmings and Penguins D. Arctic tern and Siberian cranes
40. Refer the given figure and select the option which correctly describes parts labelled as W, X, Y and Z.
Codes: a. Contains hereditary materials b. Most chemical reactions occur here c. Made of mainly sugar molecules d. Partially permeable
A. B. C. D.
W a a a b
X c b b a
Y d c d c
Z b d c d
41. Mrs Renu came to know about Mrs Sunidhi's pregnancy, but she became anxious as Mrs Sunidhi smokes badly. She knew that smoking may affect the health of the mother and developing foetus. Among the following, what are the consequences of smoking? (i) Increased heartbeat and blood pressure in the mother due to release of adrenaline. (ii) Increased blood supply to the placenta. (iii) Blood clot formation in the arteries of the mother leading to the diffusion of CO2 and urea into the foetus' blood. (iv) Reduced ability of haemoglobin to carry oxygen in the RBC, which may affect the development of the foetus' brain. A. (ii) and (iii) B. (i), (ii) and (iv) C. (i) and (iv) D. (ii) and (iv) 42. Which of the following statements is incorrect for the organism shown in the figure?
A.
B.
C. D.
This organism became extinct due to over exploitation. The category to which this organism belongs also contains Quagga and Tasmanian wolf. This organism is listed in Red Data Book. This organism is critically endangered due to continuous illegal poaching.
43. Sewage contains several dissolved and suspended impurities which pollute the water and leads to various changes. These are (i) Water becomes green (ii) Eutrophication (iii) Underwater plants die (iv) Light cannot penetrate the water (v) Depletion of dissolved oxygen (vi) Death of aquatic organisms (vii) Aerobic bacteria feed on dead plants In which order these changes take place? A. (i) → (ii) → (iv) → (iii) → (vii) → (v) → (vi) B. (ii) → (i) → (iv) → (vi) → (v) → (iii) → (vii) C. (i) → (ii) → (iv) → (iii) → (vii) → (vi) → (v) D. (ii) → (i) → (iv) → (iii) → (vii) → (v) → (vi) 44. Which of the following groups represents the bacterial diseases? A. Cholera, tuberculosis, malaria, measles B. Small pox, tuberculosis, malaria, typhoid C. Cholera, tuberculosis, typhoid, measles D. Cholera, anthrax, tuberculosis, typhoid
Copyright©2015. Science Olympiad Foundation (SOF)
16th NSO - SET B
6
45. The given figure shows the nitrogen cycle. Match the following table according to the given figure and select the correct option.
Bacteria Letters (a) Able to form nodules (i) R
(b) Able to denitrify
(ii) Q
(c) Able to nitrify
(iii) S
(d) Able to use ammonium
(iv) T
with plants
as energy source
(e) Able to fix nitrogen from
air
a
b
c
(v) P d
e
A.
(iv)
(v)
(i)/(ii)
(i)
(ii)/(v)
B.
(v)
(iv)
(iii)
(iv)
(v)
C.
(v)
(iii)
(i)
(iv)
(ii)
D.
(v)
(iv)
(i)/(iii)
(i)
(ii)/(v)
Achievers Section Direction (Q. 46 & 47) : Refer the given passage and answer the following questions. A mirror of length 2X is kept in front of a road as shown in figure. A point object is kept at a distance X from the mirror. An observer is able to see the image till distance 12 X while moving along the road.
46. What is the distance Y between the road and the mirror in terms of X? A. Y = X B. Y = 12X C. Y = 5X D. Y = 2X 47. When we stand in front of a mirror, we can see only a part of the image depending on the length of the mirror because A. The image of the rest of the body is not formed by the mirror B. Those reflected rays do not reach our eyes C. Highly diminished image is formed D. Virtual and inverted image is formed
48. Bacterial growth is the division of bacteria into its daughter cells. When bacteria are grown in a culture, they initially adjust to new medium and then start dividing rapidly, consuming available food reservoir uninhibited. In sometime, the growth becomes limited, bacteria stop dividing and eventually die. Which of the following graphs best exhibits bacterial growth in the culture at an optimum temperature over a 24-hour period?
A.
B.
C.
D.
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16th NSO - SET B
7
49. A student performed the first set of experiments with four test tubes containing solutions and metal pieces as indicated in the figure. In the second set of experiments, the metal pieces are interchanged between test tubes P and Q and also between test tubes R and S.
In which test tube(s), no reaction will occur in both sets of experiments? A. P and Q B. R C. S D. R and S
50. Consider the following statements (a-e) each with one or two blanks. a. Lactobacillus promotes curdling of milk by creating an _____ (1)____ environment.
b.
c.
d.
e.
Select the correct option to fill any four or five blanks. A. (1) acidic (2) antibodies (3) bacterial (4) female. B. (1) alkaline (4) female (5) male (6) kharif (7) rabi C. (1) acidic (6) kharif (7) rabi (8) winnowing D. (2) weak germs (4) female (5) female (6) kharif (7) rabi.
Vaccines employ the use of _____ (2)____. They give protection against _____(3) ____ diseases. The _____ (4) ____ Anopheles mosquitoes are carriers of malaria and dengue is spread by _____ (5) ____ Aedes mosquito. The crops that require more water for growth and are sown in the month of June are called _____ (6) ____ crops, while those that require less water for growth and are grown during the winter season are called ____ crops. _____ (7) Manual scattering of seeds in the field is called _____ (8)____.
SPACE FOR ROUGH WORK
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Class 8 17th
SET A Year 2014
Copyright©2015. Science Olympiad Foundation (SOF)
17th NSO - SET A
2
Logical reasoning 1.
Select the option which will replace the question mark in the given number series. A. C.
400 420
10, 100, 200, 310, ? B. 410 D. 430
2.
Mr. ‘X’ shows three photographs to Mr. 'Y'. Pointing towards photograph 1, he says, “The person in photograph 1 is my uncle, who says ‘uncle’ to the person in photograph 2, and the person in photograph 3 is called ‘uncle’ by the person in photograph 2.” How is Mr. ‘X’ related to the person in photograph 2?
A. B. C. D.
3.
At a dinner party, both fish and meat were served. Some took only fish while some took only meat. There were some vegetarians also who did not accept either of the two, while the rest accepted both fish and meat. Which of the following Venn diagrams correctly represents this situation?
Grandson Granddaughter Great grandson None of these
B.
A.
C.
4.
Six people P, Q, R, S, T and U are sitting on the ground in a hexagonal shape. All the sides of the hexagon, so formed, are of same length. P is not adjacent to Q or R; S is not adjacent to R or T; Q and R are adjacent; U is in the middle of S and R. Who is at the same distance from S as T is from S?
A. B. C. D.
5.
Select the pair of figures which satisfies the same conditions of placement of dots.
A. C.
A. C.
7.
If Fig. (X) is rotated one step in a particular direction, then identify its rotated form, from the given option figures.
Z D
B. D.
N None of these
A.
B.
C.
D.
8.
Select a figure from the given options which will complete the given figure matrix.
A.
B.
C.
D.
9.
Three of the following four numbers are alike in a certain way and so form a group. Which of the following does not belong to that group?
A. C.
D.
Q R U Can't be determined
I, II III, IV
If the alphabets are written in the reverse order after interchanging alphabets from ‘D to L’ with those from ‘R to Z’ respectively, which letter would be midway between W and E in the new order?
Fig. (X)
6.
B. D.
II, III I, IV
143 759
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B. D.
399 257
17th NSO - SET A
3
10. There are seven figures, the first and last of which are unmarked and remaining are marked as P, Q, R, S and T. However, the series will be established only if the positions of two of the marked figures are interchanged. Find the figures.
A. C.
PQ QT
B. D.
A.
14
B.
15
C.
16
D.
12
What will come in place of (b)?
A. C.
21 19.5
B. D.
23.5 16
13. There are five different successive figures showing movement of the hands in a clock. Identify the pattern and find the next figure.
QR ST
11. A pile of cubes of equal size is arranged in the form of a block as shown in the figure. If the block is dipped into a bucket filled with red paint, so that only the surfaces of the block get coloured, then how many cubes are coloured on three faces only?
A.
B.
C.
D.
14. In a code language, each of the vowels, i.e., A, E, I, O and U, is substituted by the letter preceding it, while a consonant is substituted by the nearest vowel. How can the word EVIDENCE be written in that code?
12. Two series in two rows are given below. In the first row, a full series is given which follows a specific pattern. The second row has a series, similar to the first series but only first element of this series is given, followed by (a), (b), (c), (d) and (e), representing the subsequent elements. Complete the series and answer the question that follows : 7 24 10 33 14.5 46.5 11 (a) (b) (c) (d) (e)
A. B. C. D.
DUHJEDOED DUHEDUAD DUJEDOAD DUHEDOAD OR DUHEDOED
15. At my farmhouse I am facing East, then I turn left and walk 10 metres. I again turn right and walk 5 metres. Again I go 5 metres towards the South, and from there walk 5 metres towards the West. In which direction am I from my farmhouse ?
A. C.
East North
B. D.
West South
Science 16. When a constant force acts on a mass, and the mass starts moving from rest, then the
(i) acceleration is constant (ii) velocity increases at a constant rate (iii) distance travelled is directly proportional to the time. Which of the above statements is/are correct? A. (i) only B. (i) and (ii) only C. (i) and (iii) only D. (ii) and (iii) only
17. Which planet is called the morning star as well as the evening star, depending on its position with respect to the sun? A. Mercury B. Venus C. Mars D. Saturn
s
18. The displacement-time graph of a body in motion is shown here. The corresponding velocity-time graph will be v
A.
v t
t
B.
v
v
t
D.
C.
Copyright©2015. Science Olympiad Foundation (SOF)
t
t
17th NSO - SET A
4
19. A man standing in front of a large wall, claps two objects against each other at an interval of 1.2 s regularly. The echo of the first clap coincides with the fifth clap. If the speed of sound in air is 340 m s–1, the distance between the man and the wall is ____.
A. C.
408 m 816 m
B. D.
1632 m 204 m
20. The image formed by the side-view mirror of an automobile is (i) of the same size as that of object (ii) virtual and diminished (iii) erect and real (iv) erect and magnified. Which of the following statements is/are correct? A. (i) only B. (ii) only C. (i) and (iii) only D. (iii) and (iv) only 21. The diagram shows a man standing at a position M in front of a plane mirror, a distance of x m from the mirror.
When the man moves 3 m away from the mirror, the new distance between the man and his image becomes 12 m. What is the value of x? A. 1 m B. 2 m C. 3 m D. 4 m
22. A substance in gaseous form is being cooled to solid state. Its temperature will remain constant when the substance is (i) in condensing phase (ii) in freezing phase (iii) at thermal equilibrium with the environment. A. (i) only B. (iii) only C. (i) and (ii) only D. (i), (ii) and (iii) 23. During a track and field meet, the time difference between seeing the smoke from a starter's gun and hearing the bang would be less ______.
A. B. C. D.
On a warmer day On a cooler day If a more powerful shell were used If a less powerful shell were used
24. Read the given statements and mark the correct option. Statement -1 : A convex mirror always forms a real image. Statement -2 : A diverging beam incident on a convex mirror is reflected as a diverging beam.
A.
B.
C. D.
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is false but statement 2 is true. Both statements 1 and 2 are false.
25. A cube of side 0.2 m rests on the floor, as shown. Given that the cube has a mass of 50 kg, the pressure exerted by the cube on the floor is ________.
(Take g = 10 N kg–1) A. 25 N m–2 C. 1250 N m–2
B. D.
50 kg 0.2 m
250 N m–2 12500 N m–2
26. In an electrical circuit containing a battery, the positive charge inside the battery ________.
A.
B.
C.
D.
always goes from positive terminal to the negative terminal may go from positive terminal to negative terminal always goes from the negative terminal to positive terminal does not move
27. A plank is supported on the steps of a staircase as shown in the figure. How many forces are acting on the plank?
A. B. C. D.
4 5 6 7
Plank
28. How do cyclones decrease the fertility of soil in the coastal areas?
A. B. C. D.
By By By By
flooding the land with saline water. dissolving soil and rocks. increasing the water table of the place. decreasing the water table of the place.
29. Read the given statements and select the correct option.
Statement-1 : Petroleum is called ‘black gold’. Statement-2 : Petroleum is a dark oily liquid. A. Both statements 1 and 2 are true but statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false.
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17th NSO - SET A
5
33. Identify V, W, X, Y and Z in the given Venn diagram.
30. Read the table carefully. S. Reaction No. 1. Copper vessel exposed to moist air. 2. Aluminium foil dipped in fresh solution of sodium hydroxide. 3. Rusting of iron.
Product formed Green coating
Characteristic test Turns red litmus solution blue. Colourless, Burns with a odourless pop sound. gas
Reddish brown deposit 4. Burning of sulphur Colourless, powder. suffocating gas
Identify the products formed and A. (1) Cu(OH)2 , CuCO3; basic (3) Fe2O3; basic B. (1) CuO; basic (3) Fe3O4; basic C. (1) Cu(OH)2 , CuCO3; basic (3) Fe2O3; acidic D. (1) Cu; basic (3) FeO, basic
Turns red litmus solution blue. Turns blue litmus solution red.
their (2) (4) (2) (4) (2) (4) (2) (4)
nature. H2; neutral SO2; acidic O2; neutral H2S; acidic H2; neutral SO2; basic H2O; neutral SO3; basic
31. Which of the following examples are periodic changes? I. Occurrence of eclipse. II. The flowering of jasmine bush. III. Occurrence of new moon. IV. Opening and closing of stomata. V. Appearance of rainbow. VI. Rotation of earth. VII. Blinking of eyes. VIII. Twinkling of stars. A. I, V, VII and VIII B. I, II, III and IV C. II, III, IV and VI D. All are non-periodic changes. 32. Neha, a class VIII student arranged the following experimental set-up and observed the changes carefully.
On the basis of her observations identify the correct order of reactivity. A. Zn > Cu > Fe B. Zn > Fe > Cu C. Fe > Zn > Cu D. Cu > Fe > Zn
V A. Filling
W Withdrawing money from ATM Charging mobile battery Charging mobile battery Filling a water bottle
a water bottle B. Filling a water bottle C. Burning a candle
D. Boiling an egg
X
Y
Burning a candle
Charging mobile battery Withdrawing money from ATM Boiling an egg
Burning a candle
Filling a water bottle Withdrawing Charging money from mobile ATM battery
Z Boiling an egg Boiling an egg Withdrawing money from ATM Burning a candle
34. Different mixtures are taken in four different test tubes and each of them is tested with indicators as shown below : Methyl orange
Turmeric solution
5 mL Sour milk + 5 mL Water
Pinch of baking powder + 5 mL Lime water
(1)
(2)
Phenolphthalein
China rose
Pinch of salt + 5 mL Sugar
5 mL Lemon juice + 5 mL Tamarind juice
(3)
(4)
Select the incorrect observation. A. No change in colour in test tubes 1 and 3. B. Turmeric solution turns red in test tube 2. C. China rose turns magenta in test tube 4. D. None of the above
35. Match the articles given in Column-I with the fibres/plastics from which they are made in Column-II. (a) (b) (c) (d) (e) A. B. C. D.
Column-I Column-II Toothbrush bristles (i) Melamine Carpet (ii) PVC Bottle (iii) Nylon Toy (iv) Rayon Fire resistant fabric (v) PET (a)-(i), (b)-(iv), (c)-(ii), (d)-(v), (e)-(iii) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i), (e)-(v) (a)-(iii), (b)-(iv), (c)-(v), (d)-(ii), (e)-(i) (a)-(iii), (b)-(v), (c)-(iv), (d)-(i), (e)-(ii)
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17th NSO - SET A
6
36. The manufacture of bread, beer and wine involves alcoholic fermentation of glucose to ethanol by yeast. Which of the following five statements concerning this process are correct? I. Yeast carries out fermentation because yeast cells lack mitochondria. II. For every molecule of ethanol produced, one molecule of CO2 evolves. III. For every one molecule of glucose fermented, net two molecules of ATP are generated. IV. More than 80% of the chemical energy of the glucose is released as heat. V. Glycolysis is an integral part of this fermentation. A. II, III and IV B. I, II, III and V C. II, III and V D. I, IV and V 37. Thyroxine controls _______ in frogs and the development of _______ and ______ during embryonic development of other vertebrates. Thyroxine production requires the presence of ______ in diet. Select the correct sequence of words to complete the above passage. A. Development, Circulatory system, Muscles, Iodine B. Metamorphosis, Circulatory system, Muscles, Calcium C. Development, Bones, Nervous system, Iron D. Metamorphosis, Bones, Nervous system, Iodine
40. The names of some plants are given below in the list : I. Lady’s finger VI. Grass II. Drumstick VII. Xanthium III. Balsam VIII. Madar IV. Urena IX. Sunflower V. Maple X. Coconut Match these plants with the mode of dispersal of their fruits/seeds and select the correct option.
A. B. C. D.
Animals
II, V, VI, VIII, IX
III, IV, VII
X
I
II, V, VI, VIII, IX
IV, VII
X
I, III
V, VI, IX
II, IV, VII
X
I, III, VIII
II, VI, VII, VIII
I, IX
X
III, IV, V
Process
P Q R S
Sludge removal
II. Anaerobic decomposition
X is unable to hold water or nutrients. Y is used for pot making. Z provides good aeration to plant roots. X is best suited for cultivation.
39. Read the given statements and select the correct option. Statement-1 : Chloroplast and mitochondria are semi-autonomous organelles. Statement-2 : Chloroplast and mitochondria have their own DNA and protein synthesizing machinery.
A.
B.
C. D.
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true and statement 2 is false. Both statements 1 and 2 are false.
Bursting of fruits
Some steps involved in the treatment of water in a wastewater treatment plant are labelled as P, Q, R and S in the above diagram. The table given below shows () for those steps in which the particular process is occurring while () for those in which it is not occurring. Which among these is/are incorrect? I.
A. B. C. D.
Water
41.
38. The given pie charts show the composition of three types of soil samples X, Y and Z. Which of the following is correct regarding these soil samples?
Wind
III. Cleaning of clarified watery waste IV. Disinfection of treated water
A. C.
I and II II only
B. D.
III and IV None of these
42. According to the extent of threat to a species and its population in its natural habitat, four categories have been identified which are given below : I. Extinct in wild II. Critically endangered species III. Vulnerable species IV. Endangered species Select the correct order of these species according to their conservation priority? A. II > IV > I > III B. I > II > IV > III C. III > I > II > IV D. I > IV > III > II
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17th NSO - SET A
7
43. Refer to the given figures of bacteria (X, Y and Z) and read the statements I, II & III regarding these. Based on the given information, identify the bacterium and select the correct option.
Bacteria X causes cholera. Bacteria Y causes a disease which disrupts proper exchange of gases. III. Bacteria Z converts lactose sugar of milk to lactic acid. A. X is Vibro cholerae. B. Z is Lactobacillus. C. Y is Salmonella typhi. D. Both A and C
I. II.
44. Following investigation was carried out using flower buds growing on three plants of the same species. Plant X → The anthers were carefully removed, and the buds left open to the air. Plant Y → The anthers were left untouched, and a paper bag was tied tightly around each bud.
Plant Z → The anthers were carefully removed, and a paper bag was tied tightly around each bud.
Although all flowers later bloomed normally, only those on plant X, produced seeds. This result showed that in this species _____ pollination can take place.
A. C.
Only insect Only wind
B. D.
Only cross Either of A, B or C
45. Match Column I with Column II and select the correct option from the codes given below. Column I Column II (a) SPM (i) Poisoning of bald eagles (b) Typhoid (ii) Green house gas (c) CO (iii) Vehicle exhaust (d) CO2 (iv) Incomplete combustion (e) DDT (v) Pathogens in polluted water a b c d e A. iii v ii iv i B. i iii iv ii v C. iii iv v ii i D. iii v iv ii i
Achievers Section 46.
The given graph shows two crop fields (X and Y ) that have been treated by different types of materials for nutrient replenishment, keeping other environmental factors same. Given are some assumptions regarding the crop fields and the materials used. Select the most correct one(s).
Addition of chemical fertilizers in Y has resulted in sudden increase in yield due to increased release of N, P, K nutrients, but it gradually declined as continuous use of chemicals killed useful microbes that replenish the soil fertility. II. The difference in the two graphs indicates that the crop fields X and Y are treated with fertilizer and manure respectively, as fertilizer is beneficial for long time and gives durable yield whereas manure gives immediate yield but later causes problems. III. The highest peak in crop field X is slightly delayed because manure enriches soil fertility gradually.
I.
A. C.
I and II III only
B. D.
II only I and III
47. A large number of functions are performed by different hormones secreted by endocrine glands. Match the given functions (a, b, c, d and e) to the labelled glands in the figure and select the correct option.
a.
b.
c.
d.
e.
A. B. C. D.
Maintains a steady level of glucose in the blood. Helps in the growth of human body and also sends signals to other organs to secrete hormones. Controls secondary sexual characters and maintains pregnancy. Controls rate at which food is oxidised by the cells to produce energy. Increases blood pressure and heart rate, when the body experiences stress. a b c d e R P Q T S P R Q S T S P Q R T R P Q S T
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17th NSO - SET A
8
Direction (Q.No. 48 and 49): Refer to the given passage and answer the following questions:
50. Sakshi performed two experiments as shown in figure 1 and 2, and recorded her observations in the table.
Ram jogs from one end X to the other end Y of a straight 300 m road in 2 minutes 30 seconds, and then turns around and jogs 100 m back to point Z in another 1 minute. X
300 m
Z
Y 100 m
Observation
48. What is Ram’s average speed and average velocity while jogging from X to Y respectively?
A.
1.0 m s–1 , 1.0 m s–1
B.
3.0 m s–1, 2.0 m s–1
C.
2.0 m s–1, 2.0 m s–1
D.
4.0 m s–1, 1.0 m s–1
49. What is Ram’s average speed and average velocity while jogging from X to Z respectively ?
A.
2.0 m s–1, 1.9 m s–1
B.
5.1 m s–1, 9.1 m s–1
C.
1.0 m s–1, 1.0 m s–1
D.
1.9 m s–1, 0.9 m s–1
Does paper pan burn?
Is ignition temperature of paper reached? Figure 1 Figure 2 Figure 1 Figure 2
I Yes Yes No Yes II Yes No Yes No III No Yes Yes Yes Find out the correct observation and the reason behind it from the options given below. A. I, paper has a higher ignition temperature than water. B. II, fireproof paper pan is used in figure 2. C. III, paper is non-inflammable. D. II, heat supplied to the paper pan is transferred to water by conduction, so ignition temperature of paper is not reached in figure 2.
SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
Class 8 17th
SET B Year 2014
Copyright©2015. Science Olympiad Foundation (SOF)
17th NSO - SET B
2
Logical reasoning 1.
Select a figure from the options in which Fig. (X) is exactly embedded as one of its part.
A.
B.
D.
C.
2.
Three positions of a dice are shown below. What is the number opposite to the number 1 ? 6 3
1
4
5
5
4
6
5.
If in a code REQUEST is written as S2R52TU, then how will ACID be written in that code?
A. B. C. D.
6.
8 is related to 81 in the same way as 64 is related to ________.
A. B. C. D.
A.
2
B.
3
C.
5
D.
6
3.
Vijay walks 10 kilometres towards North. From there, he walks 6 kilometres towards South. Then, he walks 3 kilometres towards East. How far and in which direction is he now with reference to his starting point?
Select a figure from the options which will continue the given series. 11 1 11 1 1 ? 3 8 4 8 6 6
A.
5 kilometres West
B.
5 kilometres North-East
C.
7 kilometres East
D.
7 kilometres West
4.
Find the mirror image of the Fig. (X), if the mirror is placed vertically to the left.
A.
C.
5
B. 6
C.
8.
Study the series carefully and answer the question that follows.
∂ = b F 2 * K S 7 5 # $ PLV 8 @ M 6 ↑ Q G © 9 3 &TY£ What will come in place of question mark?
4
7
4
D.
If '= → 2', 'K → #' and 'P → M', then '↑ → ?'.
A. B. C. D.
9.
In first row, a series is given which follows a specific pattern. The second row has a series, similar to the first series but only first element of this series is given. Identify the pattern and answer the question that follows.
Fig. (X)
A. 6
125 137 525 625
7.
4
BDJE 1394 B3J4 1D3E
B.
D.
3 T 9 &
6 2
18 a
36 b
108 c
What will come in place of e ?
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216 648 d e
17th NSO - SET B
A. B. C. D.
3
482 344 216 420
13. Select a pair of figures which satisfies the same conditions of placement of dots.
10. In the given Venn diagram, find the region representing persons who are educated and employed but not confirmed in job. Employed
Educated
b
a
A. B. C. D.
d
e
c
Confirmed in job
A.
B.
C.
D.
A. B. C. D.
R
S
PR QS PS QT
d e b a, b
Fig. (X)
A.
C.
B.
D.
15. A sheet of paper is folded in a particular manner and a punch is made. Select a figure from the options which will closely resemble the unfolded form of given sheet.
?
12. A is the brother of B. C is married to D. If C is the nephew of B, how is A related to D?
A.
B.
C.
D.
A. B. C. D.
T
14. Which of the following options will exactly make up the key Fig. (X) ?
11. Which of the following figures will complete the figure matrix ?
Q
P
Father-in-law Mother-in-law Son-in-law Daughter-in-law
Science 16. The pressure of the water near the bottom of the wall forming a dam does not depend on ______.
A. B. C. D.
The depth of the water The cross-sectional area of the reservoir Density of water Atmospheric pressure
17. When the tension in the string of a guitar is increased, but other factors remain unchanged, the sound produced ________.
A. B. C. D.
Is louder Has higher pitch Has longer wavelength Travels faster
Copyright©2015. Science Olympiad Foundation (SOF)
17th NSO - SET B
4
18. A windmill is pushed by four external forces as shown in the given figure. The force F required to make the windmill stand still is
A. B. C. D.
10 13 15 18
A. B. C.
D.
N N N N
19. The given diagram shows water being heated in a tin can. A thermometer hangs directly above it. In which way, does the thermal energy from the heat source reach the thermometer?
22. When electrodes are immersed in water and electricity is passed, then the bubbles formed on the negative terminal is
Thermometer Tin can Water
Radiation → Conduction → Radiation Radiation → Conduction → Convection Radiation + Convection → Conduction → Radiation Radiation + Convection → Conduction → Radiation + Convection
B.
3 m s–1
C.
–1
4ms
D.
6 m s–1
X
Y
2 m s–1
21. A positively charged oil drop is suspended in the air by two charged plates as shown in the given figure. What will happen to the oil drop if the positive charge in it decreases? –––––––––– +
++++++++++
A. B. C. D.
The The The The
oil oil oil oil
drop drop drop drop
will will will will
Oxygen Hydrogen Carbon dioxide Nitrogen
23. Arrange the following planets in increasing order of time required to complete one rotation around Sun.
F
20. A person X is facing a plane mirror which is fixed. While another person Y is running towards person X from behind at a speed of 2 m s–1 as shown in the given figure. How fast does person Y seem to be running towards person X in the mirror ? Mirror A. 2 m s–1
A. B. C. D.
move randomly. move upwards. move downwards. remain stationary.
(i) (iii) A. B. C. D.
Earth Mars (i), (ii), (iii), (iv) (i), (iii), (iv), (ii) (iv), (iii), (ii), (i) (ii), (iii), (i), (iv)
(ii) Uranus (iv) Jupiter
24. Two persons P and Q are standing at a distance of 100 m from a high wall as shown in the given figure. When P gives a clap, the time interval between the two (direct and reflected) sounds heard by Q is 0.2 s. If the speed of sound is 340 m s–1, then the distance d between P and Q is
A.
160 m
B.
260 m
C.
290 m
D.
320 m
Wall
100 m d P
Q
25. The speed-time graphs for three vehicles X, Y and Z are shown. Speed (m s–1) If x, y and z are the distances travelled by 10 X X, Y and Z respectively Z 5 in 8 s, then which of the Y following comparisons 0 Time (s) 8 is correct ?
A. B. C. D.
x x x x
> > = <
y y y y
= > < <
z z z z
26. Which of the following objects experience balanced forces?
A. B. C.
D.
A ball dropping vertically. A car accelerating uniformly from rest. A trolley moving at a constant velocity down an inclined plane. A plane flying in a circle with constant speed.
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17th NSO - SET B
5
27. Spoons of different materials are used to stir a hot drink. Which of the following spoons will heat up the fastest?
A. B. C. D.
Plastic spoon Steel spoon Glass spoon Wooden spoon
28. When we remove polyester or woolen cloth in dark, we can see spark and hear a cracking sound. These are due to ________.
A. B. C. D.
Static electricity Current electricity Movement of charges None of these
29. Observe the given experimental set-up and identify the gas ‘X’ and its characteristics.
31. Read the given statements carefully. P : I am the most common fire extinguisher but not suitable for oil, petrol and electrical fires. I am heavier than oil and also, conduct electricity. Q : I am an excellent fire extinguisher and most suitable for oil, petrol and electrical fires. I also, form a blanket around the fire and bring down the temperature of the fuel. Identify P and Q. P Q H2 O A. CO2 B. H2O CO C. O2 CO2 D. H2O CO2 32. Renuka, a science teacher performed the following activity to prove that air is necessary for combustion.
I
I. II. III. IV. A. B. C. D.
It is carbon dioxide. It is sulphur dioxide. It does not support combustion. It is acidic in nature. II and IV I, III and IV I and III II, III and IV
30. Namita categorised the different elements as shown below : Characteristic Na
Al
S
Fe Cu
P
a. Metal
ü
ü
ü
ü
b. Hardness
ü
ü
ü
c. Malleability
ü
ü
ü
d. Ductility
ü
ü
ü
e. Conductor of electricity
ü
ü
ü
ü
Which of the characteristics is not correctly matched by Namita? A. a, c and e B. a, b, d and e C. b, c and d D. All are correct
II
III
She asked the students to observe the flame of lighted candles placed under the glass chimneys carefully. What were the correct observations. I II III A. Flame finally Flame flickered Candle burnt went off and produced freely smoke B. Candle burnt Flame finally Flame flickered freely went off and produced smoke C. Candle burnt Flame flickered Flame finally freely and produced went off smoke D. Flame finally Candle burnt Flame flickered went off freely and produced smoke
33. Fill in the blanks. Raghav used excessive chemical fertilisers during farming which makes the soil (i) . He added (ii) to increase the production of crops. Rahul used excessive substances to neutralise the factory wastes near his field. As a result, the soil of his field became too (iii) which he treated with (iv) . (i) (ii) (iii) (iv) A. Acidic Organic matter Basic Slaked lime B. Basic Organic matter Acidic Slaked lime C. Acidic Slaked lime Basic Organic matter D. Basic Slaked lime Acidic Organic matter
Copyright©2015. Science Olympiad Foundation (SOF)
17th NSO - SET B
6
Turns China rose indicator green Y Bitter in taste
Found in spinach Z
Phenolphthalein remains colourless
A. B. C. D.
Y Z Oxalic acid Milk of magnesia Soap Tartaric acid Window cleaner Ascorbic acid Milk of magnesia Oxalic acid
35. Match the Column-I with Column-II and select the correct option given below.
a. b. c. d. e. f. A. B. C. D.
Column-I Column-II Coal tar (i) Metalling the roads Petrol (ii) Manufacture of steel Coal gas (iii) Source of heat Bitumen (iv) Vaseline Coke (v) Naphthalene balls Paraffin wax (vi) Dry cleaning a-(v), b-(vi), c-(iii), d-(i), e-(ii), f-(iv) a-(i), b-(iv), c-(iii), d-(ii), e-(v), f-(vi) a-(iii), b-(v), c-(i), d-(iv), e-(ii), f-(vi) a-(iv), b-(i), c-(vi), d-(iii), e-(v), f-(ii)
38. Body temperature of some animals changes with that of atmosphere while some animals have adapted to maintain constant body temperatures. A d v i k a investigated Z this fact using three X animals X, Y and Y Z and obtained the given graph. Which of these options correctly identifies X, Y and Night Day Temperature Z? X Y Z A. Frog Lizard Rabbit B. Lizard Cobra Rabbit C. Salamander Crow Cow D. Crow Bear Frog Body temperature
34. Identify Y and Z in the given Venn diagram.
39. Run-off pollution of a particular river resulted from overuse of chemical fertilizers by a nearby farm. Which of the following graphs correctly shows the resulting changes in levels of oxygen and bacteria in this river?
A.
B.
C.
D.
36. Which of the following statements about the characteristics of organelles are correct?
(i) Mitochondria contain their own DNA. (ii) Lysosomes contain many anabolic enzymes. (iii) Secretory liver cells have abundant number of RER. (iv) Ribosomes are always found attached to the Golgi apparatus. A. (i) and (iii) B. (i) and (ii) C. (i), (ii), (iii) and (iv) D. (i), (ii) and (iv)
37. Digestion of food involves breaking down of food components into smaller molecules by enzymes. These enzymes are active only at certain hydrogen ion concentrations. As a result, certain food combinations can facilitate or retard the process of digestion. Of the following combinations, one that can result in very efficient digestion is ______.
A. B. C. D.
Meal Meal Meal Meal
with with with with
high high high high
proteins and acid fruits starch and high proteins starch and acid fruits fat and high proteins
40. The given figure represents the location of various endocrine glands in human body. Identify the glands marked as P, Q, R, S and T and select the incorrect statement regarding these.
A.
B.
C.
D.
P R Q S
T
Gland P secretes the hormone thyroxine, which regulates growth and metabolism. Gland Q secretes the hormones corticosteroids and adrenaline, which regulate breathing, heart rate, carbohydrate metabolism and mineral balance. Glands S and T secrete the hormones which control secondary sexual characters in females and males respectively. Gland R secretes the hormone insulin, whose increased concentration leads to diabetes.
Copyright©2015. Science Olympiad Foundation (SOF)
17th NSO - SET B
7
41. Read the given statements and select the correct option. Statement 1 : H otspots are specific regions of megabiodiversity nations with large number of endemic species. Statement 2 : Endemic species are often threatened due to the introduction of exotic species from some other geographical area. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Statement 2 is true and statement 1 is false.
44. Tarun sets up a plant as shown in the figure. After a few days, he observed upward growth in the roots of the plant.
Soil X
Soil X
After few days
Soil Y
Soil Y
Day 7
Day 1
Based on his observations what can you conclude?
A.
Soil X is clayey while soil Y is loamy.
B.
Soil X is sandy while soil Y is clayey.
C.
Soil X is loamy while soil Y is sandy.
42. Select the incorrect statement from the following.
D.
It is not possible to tell.
A.
Synthetic fibres have little or no absorbency, although several of them do absorb oil.
B.
Wool fibre is harmed by acids including mild acids like vinegar.
C.
Cellulose fibres continue to glow after they are removed from the flame.
D.
Cotton fibres, linen and other cellulose fibres are quiet heat resistant and can be boiled safely.
45. Read the given passage in which some words are italicised. Agriculture has become more efficient with the advent of modern technology. Modern tractor driven ploughs are faster and better. Seed drills used today combine 5-6 traditional seed drills. Thus, they are faster and ensure sowing seeds at proper depth of 20-25 cm. Modern irrigation methods have also been developed which reduce water wastage. Drip irrigation is less expensive method particularly useful for soils with low water retention capacity. Sprinklers are more suited for uneven lands and sandy soils.
43. Refer to the given diagram which shows a cross section of the stem and select the correct option.
Part X Part Y
Some of these italicised words are put incorrectly. Find out them and select the correct option.
On girdling, swelling occurs above the girdled part due to the discontinuity of part Y.
A.
Less expensive should not be replaced as it is correctly mentioned.
C.
Conduction of water and organic solutes occurs through part Y.
B.
20-25 cm should be replaced by 10-15 cm.
C.
Low should be replaced by high.
D.
Conduction of products of photosynthesis occurs through part X.
D.
Uneven lands should be replaced by plain lands.
A.
If we put a plant in red water for sometime, the colour would then appear in the part X.
B.
Achievers Section Direction : (Q. No. 46 and 47) Refer the given passage and answer the following questions.
46. The range of the scale of the metre ruler that can be seen is
A metre ruler is held vertically in front of a plane mirror of length 15 cm as shown in the given figure. A student peeps through a hole at the 40 cm mark.
0 10 cm 5 cm
100 cm
A. C.
10 cm to 40 cm 20 cm to 50 cm
B. D.
15 cm to 45 cm None of these
47. If the hole is at 80 cm mark of the scale, then the range of the metre ruler that can be seen in the mirror is
A. C.
10 cm to 40 cm 30 cm to 60 cm
Copyright©2015. Science Olympiad Foundation (SOF)
B. D.
20 cm to 50 cm None of these
17th NSO - SET B
8
48. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure : Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon
Hook Threads of same length and thickness were taken
1. (i) Somatic cells carry out propagation - Go to 2.
Weights were put one by one till the thread broke
- P
No. of yeast cells
No. of yeast cells
A.
B.
C.
(ii) Multiple cell divisions occur - Go to 4.
3. (i) Fertilization occurs outside parent's body
Y
(ii) Germ cells carry out propagation - Go to 3.
2. (i) Single cell division forms new organism
Y
X
The environmental factor studied in the graph P can be sugar concentration in medium and in graph Q can be pH.
50. Refer the given key to identify the organisms P, Q, R, S, T and U and select the correct option.
- Q
49. Swati was studying growth of yeast under different conditions of environment. She plotted two graphs but forgot to label the X axes of the graphs. Analyse the given graphs and select the correct option.
P
D.
(ii) Fertilization occurs inside parent's body - Go to 5.
4. (i) Each cell produced after division produces new organism - R
(ii) All the cells together form a new organism - S
Q
5. (i) Embryonic development occurs outside parent's body - T
X
The environmental factor studied in graph P can be pH and in graph Q can be temperature. The environmental factor studied in graph P can be temperature and in graph Q can be sugar concentration in medium. The environmental factor studied in graph P can be temperature and in graph Q can be pH.
(ii) Embryonic development occurs inside parent's body - U
A. B. C. D.
P can be yeast, Q can be chamaeleon. R can be Plasmodium, S can be Hydra. T can be duck-billed platypus, U can be ostrich. P can be yeast, U can be spiny ant eater.
SPACE FOR ROUGH WORK
Copyright©2015. Science Olympiad Foundation (SOF)
ANSWER KEYS 13 TH NSO 1. (A)
2. (A)
3. (C)
4. (C)
5. (C)
6. (B)
7. (B)
8. (B)
9.
(C)
10. (C)
11. (D)
12. (C)
13. (A)
14. (B)
15. (B)
16. (C)
17. (B)
18. (A)
19. (A)
20. (A)
21. (B)
22. (C)
23. (D)
24. (C)
25. (D)
26. (D)
27. (C)
28. (C)
29. (D)
30. (B)
31. (A)
32. (D)
33. (B)
34. (C)
35. (C)
36. (A)
37. (C)
38. (A)
39. (C)
40. (C)
41. (D)
42. (C)
43. (C)
44. (C)
45. (C)
46. (B)
47. (D)
48. (D)
49. (C)
50. (D)
7.
8.
9.
(D)
10.
(B)
14 TH NSO 1.
(B)
2.
(A)
11. (A)
12. (B)
21. (D) 31. (C) 41. (D)
3.
(B)
4.
(B)
5.
(C)
6.
(A)
(A)
(D)
13. (D)
14. (C)
15. (A)
16. (A)
17. (D)
18. (B)
19. (A)
20.
(C)
22. (C)
23. (A)
24. (C)
25. (D)
26. (C)
27. (C)
28. (B)
29. (D)
30.
(C)
32. (B)
33. (A)
34. (C)
35. (C)
36. (D)
37. (D)
38. (A)
39. (C)
40.
(D)
42. (B)
43. (C)
44. (D)
45. (C)
46. (A)
47. (B)
48. (C)
49. (A)
50.
(A)
7.
8.
9.
(C)
10.
(A)
19. (C)
20.
(A)
15 TH NSO SET A 1.
(B)
11. (A)
2.
(D)
12. (C)
3.
(C)
4.
(B)
5.
(D)
13. (B)
14. (D)
15. (A)
6.
(C)
16. (C)
(C)
(C)
17. (D)
18. (B)
21. (C)
22. (C)
23. (A)
24. (B)
25. (D)
26. (D)
27. (D)
28. (D)
29. (C)
30.
(A)
31. (A)
32. (A)
33. (D)
34. (B)
35. (B)
36. (B)
37. (C)
38. (B)
39. (B)
40.
(C)
41. (D)
42. (B)
43. (B)
44. (B)
45. (D)
46. (B)
47. (D)
48. (D)
49. (C)
50.
(A)
7.
8.
9.
(B)
10.
(B)
SET B 1.
(B)
2.
(B)
3.
(B)
4.
(B)
5.
(A)
6.
(B)
(C)
(D)
11. (A)
12. (B)
13. (A)
14. (B)
15. (C)
16. (D)
17. (A)
18. (A)
19. (B)
20.
(A)
21. (C)
22. (A)
23. (D)
24. (A)
25. (D)
26. (C)
27. (A)
28. (D)
29. (A)
30.
(C)
31. (A)
32. (B)
33. (D)
34. (B)
35. (C)
36. (B)
37. (D)
38. (B)
39. (B)
40.
(B)
41. (A)
42. (D)
43. (B)
44. (A)
45. (C)
46. (C)
47. (C)
48. (A)
49. (D)
50.
(C)
16 TH NSO SET A 1.
(C)
10.
(D)
11. (D)
(D)
2.
12. (B)
(D)
13. (D)
3.
(B)
4.
14. (B)
(B)
5.
15. (D)
(D)
6.
16. (D)
(C)
7.
17. (A)
(D)
18. (B)
8.
(D)
19. (A)
9.
20.
(C)
21. (D)
22. (B)
23. (B)
24. (C)
25. (A)
26. (C)
27. (A)
28. (D)
29. (D)
30.
(C)
31. (B)
32. (A)
33. (D)
34. (B)
35. (B)
36. (B)
37. (C)
38. (B)
39. (D)
40.
(C)
41. (D)
42. (B)
43. (D)
44. (D)
45. (B)
46. (A)
47. (D)
48. (D)
49. (B)
50.
(C)
7.
8.
9.
SET B 1.
(D)
11. (A)
2.
(D)
3.
(C)
4.
(D)
5.
(B)
6.
(D)
(D)
10.
(D)
17. (B)
18. (B)
19. (A)
20.
(B)
26. (C)
27. (B)
28. (C)
29. (B)
30.
(D)
36. (B)
37. (C)
38. (C)
39. (A)
40.
(B)
46. (C)
47. (B)
48. (A)
49. (B)
50.
(D)
12. (D)
13. (A)
14. (B)
15. (C)
16. (B)
21. (D)
22. (A)
23. (B)
24. (B)
25. (A)
31. (B)
32. (C)
33. (B)
34. (A)
35. (D)
41. (C)
42. (D)
43. (D)
44. (D)
45. (D)
(A)
Copyright©2015. Science Olympiad Foundation (SOF)
(B)
17 TH NSO SET A 1. (D)
2. (A)
3. (A)
4. (B)
5. (B)
6. (B)
7. (D)
8. (B)
9.
(D)
10. (B)
11. (B)
12. (D)
13. (D)
14. (D)
15. (C)
16. (B)
17. (B)
18. (A)
19. (C)
20. (B)
21. (C)
22. (D)
23. (A)
24. (C)
25. (D)
26. (A)
27. (D)
28. (A)
29. (B)
30. (A)
31. (C)
32. (B)
33. (B)
34. (A)
35. (C)
36. (C)
37. (D)
38. (D)
39. (A)
40. (B)
41. (D)
42. (B)
43. (A, B)
44. (D)
45. (D)
46. (D)
47. (D)
48. (C)
49. (D)
50. (D)
SET B 1. (A)
2. (D)
3. (B)
4. (B)
5. (D)
6. (D)
7. (C)
8. (D)
9.
(C)
10. (C)
11. (D)
12. (A)
13. (A)
14. (C)
15. (C)
16. (B)
17. (B)
18. (B)
19. (D)
20. (A)
21. (C)
22. (B)
23. (B)
24. (B)
25. (A)
26. (C)
27. (B)
28. (A)
29. (B)
30. (C)
31. (D)
32. (C)
33. (C)
34. (D)
35. (A)
36. (A)
37. (A)
38. (D)
39. (A)
40. (D)
41. (B)
42. (B)
43. (D)
44. (C)
45. (B)
46. (C)
47. (D)
48. (D)
49. (B)
50. (B)
Copyright©2015. Science Olympiad Foundation (SOF)
