Chemistry Atomic Structure mock test 1
100 Questions 100 Minutes
Atomic Structure mock test 1
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- Answered
- Review
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Question 1 of 100
1. Question
For a Bohr atom, angular momentum of an electron is
(n = 1, 2, 3……)
Correct
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Question 2 of 100
2. Question
According to Mosley the relationship between the
frequency ( ) of lines in X- rays spectra and atomic
number (Z) of an element is given by the expression
Correct
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Question 3 of 100
3. Question
The element with A and Z values are same in
Correct
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Question 4 of 100
4. Question
The ratio between the number of neutrons present
in C12 and Si30 atoms isCorrect
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Question 5 of 100
5. Question
The nitride ion in lithium nitride is composed of
Correct
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Question 6 of 100
6. Question
The molecule having maximum number of electrons is
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Question 7 of 100
7. Question
In which of the following cation and anion have same number of electrons
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Question 8 of 100
8. Question
In Manganese atom in ground state, the total number
of orbitals populated with one or more electrons areCorrect
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Question 9 of 100
9. Question
The Z and A values of an element are 25 and 55. The
number of electrons, protons and neutrons in its most
stable ion respectively areCorrect
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Question 10 of 100
10. Question
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Question 11 of 100
11. Question
Nucleus was discovered in
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Question 12 of 100
12. Question
Nucleons are
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Question 13 of 100
13. Question
The presence of nucleus in the atom was predicted by
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Question 14 of 100
14. Question
Of the following fundamental particles, the one with
least mass isCorrect
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Question 15 of 100
15. Question
Magnitude of deflection of cathode rays in discharge
tube is more whenCorrect
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Question 16 of 100
16. Question
One of the fundamental particles is missing in one of the isotopes. The particle and isotope are respectively
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Question 17 of 100
17. Question
Tritium atom contains
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Question 18 of 100
18. Question
The (alpha) –particles are
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Question 19 of 100
19. Question
Which is not deflected by magnetic field
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Question 20 of 100
20. Question
Which of the following species contains 10 electrons, 11 protons, 12 neutrons
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Question 21 of 100
21. Question
The charge on the atom containing 17 protons, 18 neutrons and 18 electrons is
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Question 22 of 100
22. Question
The e/m value of electron is
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Question 23 of 100
23. Question
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Question 24 of 100
24. Question
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Question 25 of 100
25. Question
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Question 26 of 100
26. Question
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Question 27 of 100
27. Question
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Question 28 of 100
28. Question
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Question 29 of 100
29. Question
The total number of neutrons in dipositive zinc ion
with mass number 70Correct
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Question 30 of 100
30. Question
The radiation having maximum wavelength is
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Question 31 of 100
31. Question
31. The radiation having highest energy is
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Question 32 of 100
32. Question
32. Which one of the following has more wave number
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Question 33 of 100
33. Question
33. The product of which of the following is equal to the
velocity of lightCorrect
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Question 34 of 100
34. Question
34. All types of electromagnetic radiation possess same
Correct
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Question 35 of 100
35. Question
The ratio of energy to frequency of electromagnetic
radiation is called
1) Bohr’s constant 2) Rydber’s constant
3) Planck’s constant 4) Ritz constantCorrect
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Question 36 of 100
36. Question
36. The radiation of least energy amongst the following
1) x – rays 2) I.R 3) Visible 4) U.VCorrect
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Question 37 of 100
37. Question
37. Out of the following, the radiation with lowest frequency is
Correct
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Question 38 of 100
38. Question
38. Which of the following statements about electromagnetic
spectrum is not correct
1) Infra red rays have larger wavelength than cosmic
rays
2) The frequency of microwaves is less than that of
UV rays
3) X – rays have larger wave number than micro waves
4) The velocity of x – rays is more than that of
microwavesCorrect
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Question 39 of 100
39. Question
39. A photon in X region is more energetic than in the
visible region X is
1) IR 2) UV 3) Microwaves 4) Radio wavesCorrect
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Question 40 of 100
40. Question
Line spectrum is characteristic of
Correct
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Question 41 of 100
41. Question
Molecules give a band of spectral lines during
emission. This is becauseCorrect
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Question 42 of 100
42. Question
The band spectrum is caused by
1) molecules 2) atoms
3) any substance in solid state
4) any substance in liquid stateCorrect
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Question 43 of 100
43. Question
43 . When an electron jumps from higher orbit to lower
orbit, then the spectrum contain ____lines on__
backgound.
1) dark; bright 2) bright, dark
3) bright, bright 4) dark, darkCorrect
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Question 44 of 100
44. Question
44. Colour of the lines found in the emission spectrum
of Sodium
1) Black 2) Yellow 3) Red 4) GreyCorrect
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Question 45 of 100
45. Question
45. The spectrum with all wavelengths may be
1) absorption spectrum 2) emission spectrum
3) continuous spectrum 4) discontinuous spectrumCorrect
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Question 46 of 100
46. Question
Normal hydrogen atoms can not give
Correct
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Question 47 of 100
47. Question
47. Paschen series is due to the electronic transition from
all higher levels toCorrect
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Question 48 of 100
48. Question
48. In hydrogen spectrum the following series of lines
belongs to U.V regionCorrect
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Question 49 of 100
49. Question
49. The spectral series observed in Far infra-red region
of hydrogen spectrum isCorrect
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Question 50 of 100
50. Question
50. Transition of electron from M-shell to K-shell results
in the emission of
1) Cosmic rays 2) infrared rays
3) ultraviolet rays 4) X- raysCorrect
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Question 51 of 100
51. Question
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Question 52 of 100
52. Question
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Question 53 of 100
53. Question
53. Energy difference between two adjacent orbits is
minimum if they are
1) K,L – shells 2) L,M shells
3) M,N – shells 4) N,O – shellsCorrect
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Question 54 of 100
54. Question
Hydrogen electron is present in the N shell. If it loses
energy, a spectral line may be observed in the region
1) infra red 2) visible 3) ultra violet 4) any of theseCorrect
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Question 55 of 100
55. Question
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Question 56 of 100
56. Question
Rydberg constant is
1) Same for all elements
2) Different for different elements
3) A universal constant
4) Is different for lighter elements but same for heavier
elementsCorrect
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Question 57 of 100
57. Question
57. If the mass of electron is reduced to half, the Rydberg’s
constant
1) Remains unchanged 2) Becomes half
3) Becomes double 4) Becomes one – fourthCorrect
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Question 58 of 100
58. Question
58. Which of the following transition is associated with coloured spectral line
1) n = 5 to n = 3 2) n = 4 to n = 2
3) n = 2 to n = 1 4) n = 3 to n = 1Correct
Incorrect
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Question 59 of 100
59. Question
The electron level which allows the hydrogen to
absorbs photons but not to emit is
1) 1s 2) 2s 3) 2p 4) 3dCorrect
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Question 60 of 100
60. Question
Correct
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Question 61 of 100
61. Question
61. As the electron moves away from the nucleus, its
kinetic energy and potential energy are respectively
1) decrease, decrease 2) increase, increase
3) increase, decrease 4) decrease, increaseCorrect
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Question 62 of 100
62. Question
62. With the increase in orbit number (n), the difference
between energy of adjacent energy levels
1) increases 2) decreases
3) remains constant 4) cannot be predictedCorrect
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Question 63 of 100
63. Question
63. When the atomic electron is at infinite distance from
the nucleus, its energy is
1) infinity 2) zero 3) negative 4) positiveCorrect
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Question 64 of 100
64. Question
64. The total energy of the electron revolving round the
nucleus is
1) zero2) less than zero
3) more than zero
4) in some atoms less than zero and in certain atoms
more than zeroCorrect
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Question 65 of 100
65. Question
65. The change in velocity when hydrogen electron jumps
from K shell to L shell is
1) one-half of its original velocity
2) twice to its original velocity
3) one-quarter of its original velocity
4) equal to its original velocityCorrect
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Question 66 of 100
66. Question
66. In which orbit of He+ angular momentum of the
electron is h/2 π
1) first orbit 2) second orbit
3) third orbit 4) fourth orbitCorrect
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Question 67 of 100
67. Question
67. The angular momentum of an electron in an atom depends on
Correct
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Question 68 of 100
68. Question
Properties of electrons that are quantized in Bohr’s
atomic model are
1) mass and energy
2) energy and angular momentum
3) angular momentum and mass
4) mass and chargeCorrect
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Question 69 of 100
69. Question
69. Bohr’s model violates the rules of classical physics
because it assumes that
1) all electrons have same charge
2) the nucleus have same charge
3) electrons can revolve around the nucleus
4) a charged particle can accelerate without emitting
radiant energyCorrect
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Question 70 of 100
70. Question
70. Bohr’s model of atom explains
1) zeeman effect 2) photo electric effect
3) stark effect 4) none of the aboveCorrect
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Question 71 of 100
71. Question
71. Bohr’s model of atom can explain the spectrum of all
except
1) H 2) He+ 3) Li++ 4) HeCorrect
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Question 72 of 100
72. Question
72. The metal that emits photo electrons very easily is
1) Iron 2) Lithium 3) Potassium 4) CopperCorrect
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Question 73 of 100
73. Question
73. The minimum energy required to eject an electron
from an atom is called
1 ) Kinetic energy 2) Electrical energy
3) Chemical ellergy 4) Work functionCorrect
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Question 74 of 100
74. Question
74. The photoelectric emission from a surface starts only
when the light incident upon the surface has certain
minimum
1) Intensity 2) Wave length
3) Frequency 4) VelocityCorrect
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Question 75 of 100
75. Question
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Question 76 of 100
76. Question
76. Einstein photo electric effect is represented in the form of equation is
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Question 77 of 100
77. Question
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Question 78 of 100
78. Question
78. In order to designate an orbital in an atom the no. of
quantum no. required
1) One 2) Two 3) Three 4) FourCorrect
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Question 79 of 100
79. Question
79. The quantum number which determines the size of
the orbit is
1) n 2) l 3) m 4) sCorrect
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Question 80 of 100
80. Question
80. For 24th electron the principal quantum number
value is
1) 24 2) 4 3) 3 4) 5Correct
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Question 81 of 100
81. Question
81. The quantum number which determines the number
of sub-energy levels in any main energy level is
1) n 2) l 3) m 4) sCorrect
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Question 82 of 100
82. Question
82. An orbital is made of four lobes. Its azimuthal quantum
number value is
1)0 2) 4 3) 2 4)1Correct
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Question 83 of 100
83. Question
83. The quantum number which determines the shape of
the orbital isCorrect
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Question 84 of 100
84. Question
84. Azimuthal quantum number was proposed to explain
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Question 85 of 100
85. Question
85. The quantum number that was proposed to explain the Zeeman effect is
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Question 86 of 100
86. Question
86. The magnetic quantum number for the outermost
electron in sodium atom isCorrect
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Question 87 of 100
87. Question
87. The quantum number which determines the
orientation of orbitals isCorrect
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Question 88 of 100
88. Question
88. The m value not possible of a 4f-electron is
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Question 89 of 100
89. Question
89. The magnetic quantum number of electrons of Be
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Question 90 of 100
90. Question
90. The direction of spin of an electron is represented by
Correct
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Question 91 of 100
91. Question
91. The quantum no. not obtained from Schrodinger’s
wave equation isCorrect
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Question 92 of 100
92. Question
92. 14 electrons cannot be accommodated in following sub-energy level
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Question 93 of 100
93. Question
93. The quantum number which determines the energy of a sublevel is
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Question 94 of 100
94. Question
94. The (n+l) value of 5p-sub level is
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Question 95 of 100
95. Question
95. The sub-energy level having minimum energy is
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Question 96 of 100
96. Question
96. Among the various quantum numbers. (n, I, m, s) describing an electron which can have the largest value
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Question 97 of 100
97. Question
97. Maximum number of electrons can be accomodated in the following subshell
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Question 98 of 100
98. Question
98. The sub-energy level which can accomodate maximum number of electrons with parallel spin values is
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Question 99 of 100
99. Question
99. The quantum number which cannot say any thing about an orbital is
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Question 100 of 100
100. Question
100. The electrons occupying the same orbital have the same values for all the quantum number except for
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