Jee 2014 Booklet1 Hwt Atomic Structure
Short Description
Jee 2014 Booklet1 Hwt Atomic Structure...
Description
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [1]
ROLL NO.
START TIME :
END TIME :
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This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
2.
Compared to the mass of lightest nuclei, the mass of an electron is only (app.) (A) 1/80 (B) 1/800 (C) 1/1800
1/2800
(D)
Al3+
Which of the following is isoelectronic with carbon atom? (A)
3.
(D)
N+
(B)
O 2
Na+
(C)
When -particles are sent through a thin metal foil, most of them go straight through the foil because (A) (B) (C) (D)
most part of the atom is empty space alpha particles move with high speed alpha particles are much heavier than electrons alpha particles are positively charged
4.
Which of the following transitions are not allowed in the normal electronic emission spectrum of an atom? (A) (B) (C) (D) 1s 2s 2p 1s 5d 4p 5p 3s
5.
In photoelectric effect, the number of photoelectrons emitted is proportional to : (A) intensity of incident beam (B) frequency of incident beam (C) wavelength of incident beam (D) All of the above
6.
Einstein’s photoelectric equation states that E k hv W Here, Ek refers to : (A) kinetic energy of all ejected electrons (C) minimum kinetic energy of emitted electrons
7.
(B) (D)
mean kinetic energy of emitted electrons maximum kinetic energy of emitted electrons
The maximum kinetic energy of the photoelectrons is found to be 6.63 1019 J . When the metal is irradiated with a radiation of frequency 2 × 1015 Hz, the threshold frequency of the metal is about. (A)
8.
9.
10.
2 1015 s 1
(B)
Bohr’s theory is applicable to : (A) He (B)
1 1015 s 1
(C)
2.5 1015 s 1
(D)
4 1015 s 1
Li2+
(C)
He2+
(D)
None of these
(D)
r2 n 2
If r is the radius of first orbit, the radius of nth orbit of he H atom will be : r (A) r n2 (B) rn (C) n
The principal quantum number of H-atom orbital, if the electron energy is 3.4 eV , will be : (A)
1
VMC/Atomic Structure
(B)
2
(C)
3
31
(D)
zero
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [2]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
Which of the following electron transition in hydrogen atom will require largest amount of energy? (A) From n = 1 to n = 2 (B) From n = 2 to n = 3 (C) From n to n 1 (D) From n = 3 to n = 5
2.
The wave nature of electron is verified by (A) de-Broglie (B) Davisson and Germer
3.
Rutherford
(D)
All of these
The mass of an electron is m, its charge is e and it is accelerated from rest through a potential difference, V. The velocity of electron will be calculated by formula : (A)
4.
(C)
V m
(B)
eV m
2eV m
(C)
(D)
None of these
The uncertainty in momentum of an electron is 1 105 kg m / s . The uncertainty in its position will be h 6.62 1034 kg m 2 / s (A)
2.36 1028 m
(B)
5.25 1028 m
2.27 1030 m
(C)
(D)
5.27 1030 m
5.
If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would becomes : 1 (A) half times (B) times (C) four times (D) two times 4
6.
The two electrons in K-sub shell will differ in : (A) principal quantum number (C) magnetic quantum number
(B) (D)
azimuthal quantum number spin quantum number
The number of orbitals present in the shell with n = 4 is : (A) 8 (B) 16
(C)
18
(D)
32
6
(D)
8
(D)
6
7.
8.
9.
10.
The number of electrons in the valence shell of calcium is : (A) 2 (B) 4 (C)
The ground state electronic configuration of nitrogen atom can be represented as : (A)
(B)
(C)
(D)
All of the above
How many unpaired electrons are present in Ni2+ cation? (At. No. = 28) (A) 0 (B) 2 (C) 4
VMC/Atomic Structure
32
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [3]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
An electron, a proton and an alpha particle have KE of 16E, 4E and E respectively. What is the qualitative order of their de-Broglie wavelengths ? (A) e p (B) p e (C) p e (D) e p
2.
If the shortest wavelength of H-atom in Lyman series is x, the longest wavelength in Balmer series of He+ is : (A)
36x 5
(B)
5x 9
x 4
(C)
(D)
3.
Which of the following sets of quantum numbers represents the highest energy of an atom? (A) n = 3, l = 1, m = 1, s = +1/2 (B) n = 3, l = 2, m = 1, s = +1/2 (C) n = 4, l = 0, m = 0, s = +1/2 (D) n = 3, l = 0, m = 0, s = +1/2
4.
According to Bohr’s theory, the angular momentum of an electron in 5th orbit is : h h h 25 1.0 10 (A) (B) (C)
5.
(D)
9x 5
2.5
h
If the energy difference between the ground state of an atom and in excited state is 4.4 104 J , the wavelength of photon required to produce the transition is : (A)
6.
7.
8.
9.
10.
2.26 1012 m
(B)
1.13 1012 m
(C)
The orbital angular momentum of an electron in 3s orbital is : 1 h h . (A) (B) (C) 2 2 2
4.52 1016 m
(D)
4.52 1012 m
1 h . 3 2
(D)
zero
(D)
1 h 2 2
(D)
2, 11
The orbital angular momentum of an electron revolving in a p-orbital is : h h (A) zero (B) (C) 2 2 The number of radial nodes of 3s and 2s orbital are respectively : (A) 2, 1 (B) 0, 2 (C)
1, 2
In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric field? (A) n = 1, l = 0, m = 0 (B) n = 2, l = 0, m = 0 (C) n = 2, l = 1, m = 1 (D) n = 3, l = 2, m = 1 The uncertainty in the momentum of an electron is 1.0 105 kg ms 1 . The uncertainty in its position will be : (A)
1.50 1028 m
VMC/Atomic Structure
(B)
1.50 1026 m
5.27 1030 m
(C)
33
(D)
5.25 1028 m
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [4]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
2.
The correct statement about proton is : (A) It is nucleus of deuterium (C) It is an ionized hydrogen molecules
(B) (D)
It is an ionised hydrogen atom It is an particle
When a gold sheet is bombarded by a beam of particles , only a few of them get deflected, whereas most go straight, undeflected. This is because : (A) the force of attraction exerted on particle by electrons in insufficient
3.
(B) (C)
the volume of nucleus is smaller than atom the force of repulsion acting on fast moving particle is very small
(D)
the neutrons have no effect on particle
The charge to mass ratio of particles is approximately ….. the charge to mass ratio of protons : (A)
4.
six times
(B)
four times
(C)
half
Which of the following atoms has same number of protons and neutrons in its nucleus? (A) Carbon (B) Deuterium (C) Tritium
(D)
two times
(D)
Nitrogen
5.
The radius of which of the following orbit is same as that of the first Bohr’s orbit of hydrogen atom? (A) Li2+ (n = 2) (B) Li2+ (n = 3) (C) Be3+ (n = 2) (D) He+ (n = 2)
6.
According to Bohr’s theory, the angular momentum for an electron of 3rd orbit is : (A)
7.
8.
9.
10.
(B)
3h
1.5 h
The number of waves in an orbit are : (A) n2 (B) n
h
(C)
9h
(D)
2
(C)
n 1
(D)
n2
The magnitude of the spin angular momentum of an electron is given by : (A)
S s s 1
(C)
S
h 2
3 h 2 2
h 2
(B)
Ss
(D)
None of these
The ratio of kinetic energy and total energy of an electron in a Bohr orbit of a hydrogen like species is : 1 (A) 1 (B) (C) 2 (D) 1 2 Which of the following sets of quantum number is correct? 1 2
(A)
n 5, l 4, m 0, s
(C)
n 6, l 0, m 1, s
VMC/Atomic Structure
1 2
(B)
n 3, l 3, m 3, s
(D)
n 4, l 2, m 2, s 0
34
1 2
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [5]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
2.
The correct set of four quantum numbers for outermost electron of potassium (Z = 19) is : 1 1 1 4 , 1, 0, 3, 1, 0, 4 , 0, 0, (A) (B) (C) (D) 2 2 2
3, 0, 0,
1 2
A body of mass x kg is moving with a velocity is 100 ms 1 . Its de-Broglie wavelength is 6.62 1035 m . Hence, x is : ( h 6.62 1034 Js ) (A)
3.
(B)
0.25 kg
(C)
0.15 kg
(D)
0.2 kg
The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is : ( h 6.63 1034 Js ) (A)
4.
0.1 kg
4 1020
(B)
1.5 1020
3 1020
(C)
(D)
2 1020
The ionisation enthalpy of hydrogen atom is 1.312 106 J mol1 . The energy required to excite the electron in the atom from n = 1 to n = 2 is : (A)
5.
6.56 105 J mol1 (C)
7.56 105 J mol1 (D)
9.84 105 J mol1
(C)
23 103 s 1
(D)
5 102 s 1
(C)
Zeeman effect
(D)
Rutherford effect
Time period of a wave is 5 103 s , what is the frequency ? (A)
6.
8.51 105 J mol1 (B)
5 103 s 1
(B)
2 102 s 1
Splitting of spectrum lines in magnetic field is : (A) Stark effect (B) Raman effect
7.
An electron from one Bohr stationary orbit can go to next higher orbit : (A) by emission of electromagnetic radiation (B) by absorption of any electromagnetic radiation (C) by absorption of electromagnetic radiation of particular frequency (D) without emission or absorption of electromagnetic radiation
8.
The values of four quantum number of valence electron of an element are n = 4 l = 0, m = 0 and s (A)
9.
(B)
Ti
(B)
20 Ca
(C)
Na
(C)
20 Ca
(D)
Sc
(D)
18 Ar
An isobar of 20 Ca 40 is : (A)
10.
K
1 . The element is : 2
18 Ar
40
38
42
38
The energy of second Bohr orbit of the hydrogen atom is 328 kJ mol1 ; hence the energy of fourth Bohr orbit would be : (A)
41 kJ mol1
VMC/Atomic Structure
(B)
1312 kJ mol1
164 kJ mol1
(C)
35
(D)
82 kJ mol1
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [6]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
The orbital angular momentum of an electron in a d-orbital is : (A)
2.
4.
2
(B)
h 2
h 2
(C)
(D)
2h 2
8.46 Å
(B) 0.705Å
(C)
1.59 Å
(D)
2.38Å
Which one of the following sets of ions represents a collection of isoelectronic species? (A)
K , Cl , Ca 2 , Sc3
(B)
Ba 2 , Sr 2 , K , S2
(C)
N3 ,O 2 , F , S2
(D)
Li , Na , Mg 2 , Ca 2
For a Bohr atom angular momentum M of the electron is (n = 0, 1, 2 …) (A)
5.
h 2
The radius of the first Bohr orbit of hydrogen atom is 0.520 Å . The radius of the third orbit of H will be : (A)
3.
6
nh 2 4
(B)
n 2h 2 4
The H-spectrum show : (A) Heisenberg’s uncertainty principle (C) polarisation
nh 2 4
(C)
(B) (D)
(D)
nh 2
diffraction presence of quantized energy level
6.
Which of the following statements does not form a part of Bohr’s model of hydrogen atom? (A) Energy of the electrons in the orbit is quantized (B) The electron in the orbit nearest the nucleus has the lowest energy (C) Electrons revolve in difference orbits around the nucleus (D) The position and velocity of the electrons in the orbit cannot be determined simultaneously
7.
Electrons will first enter into the set of quantum numbers n = 4, l = 0 or n = 3, l = 2 (A) n = 5, l = 0 (B) both possible (C) n = 3, l = 2
8.
77 32 Ge
(B)
77 33 As
77 34 Se
(C)
Which of the following sets of quantum number is allowable: (A) (B) n 2, l 1, m 0, s 1/ 2 (C)
10.
data insufficient
(D)
78 36 Sc
76 An isotone of 32 Ge is :
(A) 9.
(D)
n 2, l 1, m 1, s 1/ 2
n 2, l 2, m 1, s 1/ 2 n 2, l 1, m 0, s 0
(D)
The transition of electrons in H atom that will emit maximum energy is : (A) (B) (C) n3 n 2 n 4 n3 n5 n 4
VMC/Atomic Structure
36
(D)
n 6 n5
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [7]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
2.
Which out of the following configurations is incorrect? (A)
1s 2 2 s 2 2 p x2 2 p 2y 2 p 0z 1
(B)
1s 2 2 s 2 2 p1x 2 p1y
(C)
1s 2 2 s 2 2 p1x 2 p1y 2 p1z
(D)
1s 2 2 s 2 2 p 6 3s 2 3 p 6 3d 5 4 s1
Which of the following set of quantum numbers is an impossible arrangement? (A) (B) n 3, m 2 , s 1 / 2 n 4 , m 3, s 1 / 2 (C)
3.
n 5, m 2 , s 1 / 2
If the energy of electron in H atom is given by expression, 1312 / n 2 kJ mol1 , then the energy required to excite the electron from ground state to second orbit is : (A) 328 kJ (B)
4.
8. 9.
10.
984 kJ
n 4, l 1, m 2, s 1/ 2
(D)
1312 kJ
n 4, l 3, m 3, s 1/ 2 n 4, l 1, m 0, s 1/ 2
(D)
1/100 cm
(B)
66 1034 m
1.32 1035 m
(C)
(D)
6.6 1028 m
The work function of a metal is 4.2 eV. If radiations of 2000 Å fall on the metal, then the kinetic energy of the fastest photoelectron is: (C)
3.2 1019 J
(D)
6.4 1010 J
The number of spherical nodes in 4s orbital is : (A) 4 (B)
(C)
2
(D)
3
The ratio of the radii of the three Bohr orbits is : (A) 1 : 1/ 2 : 1/3 (B) 1:2:3
(C)
1:4:9
(D)
1 : 8 : 27
(D)
Unpreditable
(A) 7.
(C)
A cricket ball of 0.5 kg is moving with a velocity of 100 ms 1 . The wavelength associated with its motion is : (A)
6.
656 kJ
Which of the following sets of quantum numbers is not possible? (A) (B) n 4, l 1, m 0, s 1/ 2 (C)
5.
n 3 , m 3, s 1 / 2
(D)
1.6 1019 J
(B)
16 1010 J
How many electrons in an atom with atomic number 105 can have (n + l) = 8? (A) 30 (B) 17 (C) 15
If the threshold wavelength ( 0 ) for ejection of electron from metal is 330 nm, then work function for the photoelectric emission is : (A)
1.2 1018 J
VMC/Atomic Structure
(B)
1.2 1020 J
6 1029 J
(C)
37
(D)
6 1012 J
HWT/Chemistry
Vidyamandir Classes
DATE :
MARKS : 10
IITJEE :
NAME :
TIME : 25 MINUTES
TEST CODE : At.Str [8]
ROLL NO.
START TIME :
END TIME :
STUDENT’S SIGNATURE :
TIME TAKEN:
PARENT’S SIGNATURE :
This test contains a total of 10 Objective Type Questions. Each question carries 1 mark. There is NO NEGATIVE marking. Choose the correct alternative. Only one choice is correct. 1.
In excited H atom, when electron drop from n = 4, 5, 6 to n = 1, there is emission of : (A) UV light (B) Visible light (C) IR light
(D)
Radio waves
2.
The wave mechanical model of an atom is based upon which of the following equations? (A) Schrodinger’s equation (B) de Broglie’s equation (C) Heisenberg’ uncertainity principle (D) All the above
3.
For a given principal level n = 4, the energy of its subshells is for the order : (A) s
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