NSO Level 1 Class 8 PDF

 

sOF NATIONAL SCIENCE

OLYMPIAD20l 9.20

Guidelines for the Candidate 1.

You will get additional ten minutes to fill up information about yourself.on the OMR Sheet, before the start of the exam.

Section, Roll No. and Mobile Number clearly on the OMR Sheet and do not forget to sign it. your We will share marks / result and other information related to SOF exams on your mobile number.

2. Write your Name, School Gode, Class, U,

The Question Paper comprises three sections:

Logical Reasoning (10 Questions), Science (35 Questions) and Achievers Section (5 Questions) Each question in Achievers Section carries 3 marks, whereas all other questions carry one mark each. 4. All questions are compulsory. There is no negative marking. Use of calculator is not permitted. E

There is only ONE correct answer. Choose only ONE option for an answer.

6. To mark your choice of answers by darkening the circles on the OMR Sheet, use HB Pencil or Blue

/ Black ball point pen only. E.g.

Q.16: ln the water cycle, condensation is the process of A. Water vapour cooling down and turning into a

liquid

C. Liquid cooling down and turning into ice

B. lce warming up and turning into a liquid D. Liquid warming up and turning into water vapour

As the correct answer is option A, you must darken the circle corresponding to option A on the OMR Sheet. 7. Rough work should be done in the blank space provided in the booklet. B.

Return the OMR Sheet to the invigilator at the end of the exam.

g. Please fill in your personal details in the space provided on this page before attempting the paper.

16.c@@@

 

l"

if 'MYSTERIOUS' is coded as 'FIITZI{UWQKT', then how will 'PRODUCTIVE' be coded in the same language? In

a

certain code language,

A. FWJUDVEPSQ B. C. VEPSQGXKVE D. 2.

6.

7.

Which of the following nurnbers represents the students who like swimrning and football but not cricket?

8.

A.3 8"5

A

It {t

(i)

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ii)

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A. 25x5-4:6 C. 21 x 6-3:6

B. D.

i ::':

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his starting point?

A" C.

km, 'West 15 km, West

11

B. D.

km, East 15 km, East 11

Select a figure flrom the options whicli does not satisfy

the sarne conditions of plaeement of the dcts as in tho given f,gure"

A.

100

i.

i-i--l i\--/l rl

l,^'l i

'.-;

Samay travels L2 km tow.ards West, f*rns right and travels 5 km and then turns left and trar.els another 3 krn and then agatn turns left and travels another 5 km. How far and in which direction is iee now frorn

\

- 6x7-

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l'Y

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9.

18

.i"::':.':'.:'',:::.::.::r\-d

(-

(

will be incorrect?

[.'.

f;'.{"-},,,,,;,,,.,,.1 .,,,,,

the signs 'x' and -) ate interchanged in each of the followirrg options, then which of the following

If

il^l

1',1 :,.,..1 : : "'"::'l

l. ,:,:,: . : ::: : : : : ::,:, ::' ,:: :r\., ,'-'.r 6 : t l : :l l l l l l : t l : : l : :l t : 7 \rl,

IffiX

(iv)

D.

t[

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options

HrzQDVeSO?oaO

 

B.

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: ...:..::.:.:.l.,".:. : .:.:.l.,".:.:...:.:. : ...:.:.l:...'i l :...'i I Q..,..::...:..:

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HRSQDy$s0isqo

The question consists of a set of three fg,-ireS X, \t' atldZ showing a sequence of fotrding of a piece of paper.Fig. (Z)

X

Which of the follcwing figures is not exactly embedded in the given figure as one of its parts?

A.

HrsQDAes0i@Do

B. D.

shows the manner in u,hich the foidec paper has been eut. Seie*t & f;gure from the ,;ptions -inich ivould rcost el*seiy rcsembl* the unfolded fonl oi Fig. {,2}.

ffiffi

t-\ I

HvsQDves0isao

How many 6's are there in the given affangement, each of which is immediately preceded by an odd number and irnmediately followed by an even fiumber?

There is a eertain relati*nship between figures (i) and (ii). Establish the similar relationship between figures (iii) and (iv) by selecting a suitable figure from the options which will replace the (?) in Fig. (iv).

A.

HR26DA$20? @sA

87678 6 7 s 67 97 6L 67 7 688697 687 A" None B. One C. Two D. Three

students who like swimming.

3.

of letters, numbers and symbols.

A. c.

QSPEVDUJWT VEPSQFWJUD

In the given V-enn dtagram, triangle represents the students rvho like cricket, rectangle represents the students wlto like football and circle represents the

{.& T-\ nJ.

Select the correct water image of the given combination

C.

ffi @

R

_tJ.

],).

SBr t NSO Class-B I Set-B I Levet

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11.

f.

ffi. fiI.

A. C" 12.

ffii.

When the object apprcaches the flocatr p*ittt frorza the converging lens, then the size *f the ircage

A. C"

imcreases.

The image fcrnted by a thick cs$vergisag lens is brightor to that forueed by u thiru eoffivergirag legns. Whem the object is pXaced very flar away froset thc trens, the integCI distaffiee apprsaehes f*cai tremgth. B. I and III only { asrd {E ontry D. III only {, iX arad iX{

f;\ i.

.L

ffi

ffiU

','ll"I+*i...i.i..i.iii.......il

4t"g

A. c. x6"

t7.

here. 50 d, C' dr: d,

graph?

rff

1390$/

What happems to ths brightness of the ianlp when the

alternative?

9

lVhich of the foXlowing staternents are truo about the

At point P, the lift is stationary.

lift is slowing down from point Q to point fi. At pcint ft, the lift is at rest. Veloeity of the lift is minimurn at poiilt 8. ts" trtr and IV only tr and IXI only D. m, Iff and IV onXy I, il and trII only The

Wkrich af the following statements is/are correct regarCing the instrument eup anemometer?

X.

TBow

E" D.

liquids of densities d, and dr, th* iength of the object seen above the liquid surface are 4 cm and 5 ctn respectively. Which of the following is the correct

JU

1n $ 4,, Z, \J

14.

200'w

18. Wieen an objeet is rnade to float in two different

t-r

I" $. ffiI. ry" A. C.

scatre?

: Etectric appiiances with naetaltric b*dy have three pin coffi.$ecti*ns, whereas an electric bulb }:"as twc pin eonrxecticsas" Sta€emeEnt 2 : Three pin coffinCIotians reduce treating of eonnecting wires" A. Both staternents 1 and 2 are true and statement Z is the con'ect explanation of staternent 1. B. Both statements 1 and Z are true but statemer,t Z is not the correct explanation of statement 1" C. Statement 1 is true but stateme*t.2 is false" D. Both statements 1 and 2 are fatrse.

The displaceatent-tixne graph of a lift clirnbing frorn the ground floor tc the tcp of the buitrding is given

()

the Ceisius

S€atesseesat

None of these.

+J

cra

A" Et becomes dimmer. ffi. {t beeomes brighter. C" It goes ofr" *. {t remains the sa{ne.

decreases

Ii

the speed of the wind. The ru.rmber ofrevolutions naaCe by cups is direettry proportional tc the speed of the wind. ts. X, ffi and {II I anly D. tdone of these E ased {{I only

swsteh ,5 is closed?

The metal ball canjust pass through the metal ring. If the metal ring is heated, then it and there is no change pass The ball through will A. in the shape of the ring B. The ball will pass through it and the diameter of ring increases C. The ball gets stuck and the diameter of the ting

D.

Ttre hailow metaltric cups in it are ussd to increase

W scatre of temperature cailed the & liraear ii.fiw *n se aXe, the flre *ztwgand boiiing p*ints of water &{fr 39'W axnd 239"W r€spectively. W?rat witrl be the ternperature cn the ffifiw scale, Csrresponding to a tenaperature cf

39'C

Consider the figures of a metal ball and a metal ring given here.

tsall

t3"

fi.

Which *f the fcltr*wi*g statements is/aro alw,ays true regarding a eonverging iens?

ni is used to measure the speed of the wind.

NSO Class-fi Set-B iLevel 1 ISEF

1

9.

B' D.

The diagrarn shows three rods made af Cifferent materiatrs

placed inside clifferent coils.

Which of the rods will not show any polarity (in context of magnetism)?

A. I B" II

fiI of these C. None D.

cr< d,

None of these

l

HI

 

20. If

the tension in the string of a guitar is increased keeping other factors unchanged, then which of the followir-rg statements is/are incorrect?

25. Whenever the surfaces/layers

in contact tend to move or move with respect to each other, the force of friction comes into play

I. The sound produced is louder. II. The sound produced has higher pitch. m. The sound produced has lower pitch. A. II only B. I only

A. B. C. D.

only III III C. II, and D. II and

26.

22.

Rises

Falls Falls in the beginning and rises to the same level later. can

C. 23

fi

A. B" C. D.

.

B.O D. ,S

then

of

elec

tricity,

Lightning could occur with higher intensity Lightning could occur with lower intensity Lightning could not occur at all None of these.

(a) Jupiter

(i)

(b) Saturn (c) Mars

(ii) (iii)

(d) Neptune

Jute

Melamine

D.

None of these

A group of class 8 students categorised as shown in the table.

Column

Characteristic

K

Zn

C

Fe

Cu

a.

Metal

,/

x

,,/

b.

Hardness

x

,/ ,/

,.

,/

c.

Malleability

x

"/

,c

x

,/ ,/ ./

d.

Ductility

t

x

e.

Conductor of electricity

'*

,/

,/ ./

,/ ,/

,/ ,/

Red planet Spins slowly in rhe opposite direction with respect to most

P JC

t/

,/ JC

,/

all the elements? A. a and e only

B. C. D.

II

Irs density is less rhan that of water.

a few elements

Which characteristic(s) is/are coffectly matched for

24. Match column I with column II and select the correct option from the given codes. Column I

Polyhene

Materials (iii) and (vi) have polymer chains with crosslinks which help them to change shape on

(Drawn to scale)

. If air and clouds were good conductors

(ii) (iv) (vi)

heating.

27

P

gas.

C.

form the image I?

Converging lens

A.

or

Select the incorrect statement regarding these materials. A. Materials (i) and (iv) are derived from natural sources and are completely biodegradable. B. Materials (ii) and (v) contain linearpolymer chains and become soft on heating.

Remains unchanged

which of the following objects

Irrespective of whether the objects are solid, liquid

(i) Cotton (iii) Bakelite (v) Terylene

inside rt, is floating in water in a vessel. When the ice melts completely, then the level of water in the vessel

A. B. C. D.

if the objects are solid if one of the two objects is a liquid if one of the two objects is a gas

A few materials are listed in the given box.

. A piece of ice, with a stone embedded

2l

Only Only Only

28.

e, b and e only b, c and d only a only

observe the given figures showing the mixing of chemicals in four different test tubes. H2S{f4

l=

dil. HCI

planets.

(iv) Spins so fasr rhar a

Magnesium

day lasts only under 10 hours

(e) Venus (v) Fourteen moons A. (a) - (iv), (b) - (i), (c) - (v), (d) - (iii), (e) - (ii) B. C. D.

(a) - (i), (b) - (ii), (c) - (v), (d) - (iv), (e) - (iii) (a) - (iv), (b) - (v), (c) - (iii), (d) - (ii), (e) - (i)

(a) - (iv), (b) - (i), (c) - (ii), (d) - (v), (e) - (iii)

(3)

dil. HCl

dil. HCI

Calcium

Copper

carbonate

(4)

which of the following statements is/are correct? SBP I NSO I Class-8 | Set-B I Levet

'l

-

 

I. II. ru. ry.

H, gas is evolved in test tube (1).

Test tube (2) will burst as a large amount of heat .is evolved. No reaction takes place in test tube 3. In test tube 4, yellowish-green chlorine gas is evolved.

A. II and IV only C. II and III only 29.

The correct staternents are

A. C. 33.

B. I only D. I and IV only

Read the given statements and select the correct

ts.

option.

Statement 2 : Inflammable substances have high ignition temperature 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.

/

30. A brief information given here

about substances

{

C. D" 34.

Z : Atough and porous black solid prepared by heating coal in the absence of air.

31.

35

"

Sodium

Iron

B. D.

Potassium

Calcium.

32. Consider the following statements I. Washing soda is an acidic salt whereas baking :

II. m. ry.

A.

B" C.

pu{poses.

earlier it for lighting An unknown metal Xwhen placed in"copper sulphate solution, red brown pieces of copper fall to the bottom of the test tube. When metal Xis placed in aluminium sulphate solution, no change is observed. Metal X can

A. C.

soda is a basic salt. Tamarind juice does not change the colour of red

D.

36.

Fertilisation of ovum takes place tn Y. Development of fetus takes place tn Z. X is the site of implantation of embryo. W controls secondary sexual characters in fematres.

F{ealthy seeds" being lighter float on the surface

of

water"

Damaged seeds being lighter float on the surface

of water.

Some healthy seeds and some damaged seeds float

on the surface of water. Darnaged seeds being heavier settle down at the

Read the given paragraph. Organism P has leathery lips and a btg hump on its back, organisrn A has thick layer of subcutaneous fat and a dense fur covering on its body whereas organisrn R is brightly coloured and has long, large and colourful beak. Which of the following does not hold true for organisms

'P,QandR?

A, B.

soil.

C. D.

NSO Class-8 t Set-B I Leve 1 I SgF

X

bottom"

litmus solution. Slaked lime neutralises the acidic nature of the

Milk of magnesia is acidic in nature.

The change can be reversed by galvanisation" None of these

Take a beaker and fill half of it with water. Put some wheat seeds in it, stir it and wait for sorne time" Which of the following holds true regarding the observation and inference of this experiment?

monoxide and some other gases. I is a mixture of about 2A0 substances which can be sep arated by simple distillation. Z contains almost 98 percent carbon. Nowadays X is used as a source of heat while

be

change.

Refer to the given figure of female reproductive system and select the correct statement regarding

A. B. C. D.

Which of the following statements is incorrect about X, Y and Z? A. X is a mixture of methane, hydrogen, carbon

was used

The process represents a reversible chemical

Y and Z is

Y : A thick black liquid having an unpleasant smell obtained by heating coal in the absence of air.

C. D.

The given process becomes faster when humidity is high in the atmosphere"

WX,YandZ.

: fuel obtained X of air. by the strong heating of the absence coalAingaseous

B.

Observe the given process and select the correct option.

A.

infl ammable substances.

\

II, III and IV only II and III only.

Moist air

Statement 1 : Coal, charcoal and cow dung cakes are

\

I, il and IV only B. I, ffiI and IV only D"

Organism P excretes very little water in the form

of urine. Organism S undergoes hibernation in extrerne

conditions. Organism ft has poison giands in its skin. Both A and ts

 

t

37. Consider the following

statements and select the option that correctly iCentifies true (T) and false (F)

Identify the labetrled parts P-,S and select the incorrect statement regarding them.

ones.

(i)

(ii) (iii) (iv)

female individuals. The animais which lay eggs are called viviparous

animals.

Parathyroid hormone regulates the caleium and phosphate balance in the body. (i) (ii) {iii) (iv}

A.F F B.F T C.TTF'F D.F F 38.

(i) P provides strength and support to the plant. (ii) ,S is known as the secretory organelle of the cexl. (iii) A synthesises proteins and lipids and sorves as

Thyroxine hormone is released in the body at the time of stress" Hermaphrodite animals have separate rnatre and

F F

T

T

T

(iv)

transport ctiannel for rnateriatrs tc pass. R is absent in animal ce1l.

A. C.

(i) and (ii) cnly (i) and (iii) only

44. Refer to the given table and identify L, M, AI and #. WildEife Conservation Sites Kazwanga Nationai Fark

T

Rahul conducted an experirnent as shown here. Sunlight Bubbles of gas Iaverted test tube

Sundarban ]o{ational Park

nr

C

Asiatic lion

B.

Inverted glass funnel

C.

Support to keep funnel off bottom

Which cf the fcllowing statements is incorrect regarding this? A. tr{ydrilla pLartt cannot photosyntiresise as CO, is not avaitrable to the plant. B. NaHCO, present in the water prcvides CO, to the

C. T} lJ"

39

"

M^r

L

Neelgai

glass

Water containing

L Kashrair stas

A.

NaF{CO3

Organism for wEaicEa the.v are knowxa

M

i

Glass beaker

Hydrilla piant

oniy (ii) and (iii) ts. D. (ii) and (iv) only

One horned

rhincceros

#

Dachigam Desert

Rann

National Park

Kuteh

fox

Sanctuary

Dachigam Royal

National Park

Gir

Bengal

National Fark

tiger

Gir National Siberian

Flamielgo

Park

D. One horned Mudumalat rhinoceros

Sanctuary

of

Rann

Kutch

crane

of

Sanctuary

African

Gir

elephant

National Park

41

.

Refer to the given figures sho';ring seeCslfruits of three different plants.

plant.

Sunlight can reach the plant propertry and hence the plant can photosyntkresise. The bubbtres produced in water within the test-tube are mainly of oxygen gas.

R-efer to the given ultrastructure

of a plant

(iii)

Select the option which contains name of plants ttrat

can correctly replace (i), (ii) and (iii) respCIctively, based on the mode of dispersal of their seeds. (i) (iii) {ia}

cel1.

A. Hiptage B. k{adar C. Acer D. Lotus 42.

Fea

Calotropis

Balsam

Cotton

Lotus

Castor

Calotropis

{Irerca

the given statentents a*d select the eption that correctly fiiis the blanks in an,v two of these statements. R.ead

(a)

(b)

is the only naturally occurri*g mineral

fibre. V{ohair is obtained from

S@P I NSO Class-8 | Set-B I Levet

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(c) . B. C. D. 43.

Anthrax is a baeterial disease that affects both

B. C.

Rust of wheat is a fungal disease that spreads by air. Citrus canker is a viral disease that affects eitrus

(i)

Cistances.

Spraying pesticiCes in agricultural fields to controtr pests.

The figure shows a girl viewing a rod plaeed in front of a plane mirrcr. When the cardboard is removed verticaltry upwards, which points will be seen first

B.

C.

Cardboard

D.

Girl

48.

A.X B.Y C.Z D.X 47

.

X X

Speed

of sound

-

and speed of iight

ftw words

cliff

have been

water escapes from a revolving nozzl"e. Weeding in crop fields can be done using combine. After the crop is harvested, the grain is separated from cut crop using a machine called threslter.

NSO I Class-B I Set-B Level 1 lSgF'

rnentioned. Cowtbine shauld be replaced by harvester.

.

Preparation of soil in a field, before sowing of seeds involves two steps : broadcasting and levelling. Soil in the crop field is enriched with nutrients by adding manures and fertilisers to it. Crop fields need to be irrigated, frorn time to time. In sprinkler system of trrtgation water is ailowed to fall drop by drop from a pipe just near the plant roats whereas in drip irrigation

%-

Positions of sprinfr{er systern and drip irrigatian strould be interchanged. Threslter should not be replaced as it is correctly

Rakesh f,res a gun 160 m from a clifr. Ashok who is standing 32A rn further eway from the ctriff hears the gunshot (i) second after he sees the flash. Ashok and Rakesh will hear the echo from the eliff

Y

italicised.

Bacteriurn Q can causc pneumonia. Bacteriurn,S can convert lactose sugar of milk into

second and (iii) (ii) ,6* (iy) {y)

Z

Read the given paragraph where

tubercutrosis.

Seleet the ineorreet option regarding these. A. Broadcastiwg should be replaced by tilling.

and last by her?

Seen last

Bacterium P can be the causal organism of

lactic acid. (iv) Bacterium ft can be the causal organism of syphilis" Which of these statements is/are correct? A. (i) and (ii) only B. (iii) and (iv) only C. (i), (iii) and (iv) only D. (ii) and (iii) only

lJse of bicycies instead cf cars for covering short

first

fts

a

P

(ii) (iiii

ladyfinger.

@ffi

W ffi

".Be

Yellow vein mosaic is a viral disease that affects

Seen

B. II and IIX on13r D. II and IV only

flgures of bacterta P, 8, R and S and read the given statements regarding them.

fruits.

Mirror

CNG, LPG, etc. lJse of CFCs in refrigeration and air conditioning.

45. Ref,er to the given

humans and cattle.

rc

lJse of unleaded petrol and sntokeless fuels like

IV. A. I and trII only C. I and iV only

Which of the following witrl help in controlling atr pollution?

il.

"

the eocoon and combining them to make a thread of raw silk is called --. rabbit (a)-Asbestos, (b)-Angora (c)-Scouring goat, (b)-Angora (a)-Asbestos, (e)-Reeling (b)-Angora goat, (c)-Carding

A.

I.

46

m.

unwinding the silk filarnents from

Select the inccrreet statement.

D. 44.

T'he process of

15S rn

second respectively after

32fr rnls lapproximate)

- 3 x 108 mis

320 m

Ashok Rakesh

A.

{i}

(ii)

1  -

2

1

2

C.

2

1

D.

-t

B.

I

1.5

(v} (iii) {iv} 1 Seeing Flash

21 1

Gunshot

Hearing Hearing Gunshot

Seeing Fiash

 

a

49.

Refer to the given nitrogen cycle occurring in nature.

D

Process

50. Observe

I

Deat h, and I excret ion

il il

organic compounds. Process

ifil

Salt

solution

solution

ofU

ofX

Sait

solution

ofX

I/

Identify processes I-IV and select the correct statement regarding thern. A. Process II represents the conversion of ammonia into nitrates and is accomplished in two steps. In process IY plants absorb inorganie nitrogen B. compounds from the soil anC convert them into

C.

V

Salt

Nitrogenous

Compounds of nitrogen in soil

the following experimental set-ups carefully. Z

la..uy

waste

represents nitrogen fixation by

It{itrosoruowas.

Atmospheric nitrogen

f'oce*IVl

III

I represents the conversion of nitrates to

free molecular nitrogen.

Salt

Salt

solution

If no reaction

solution

afZ

ofU

IVVVI

Salt

solution

occurs in beakers

ofW

II, IV and V,

then

which of the following statements is correct? A. Xis less reactive than Ubut more reactive than Z. B. W and X are more reactive than V

C. Z and W are less reactive than I D. V is more reactive than Wbut less reactive thart U.

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