B.Sc. First year Undergraduate degree course Semester First Inorganic chemistry
Chapter-Atomic Structure
Multiple choice questions
1.Which of the following is not sub - atomic particle of atom.
a) Positrons.
b) Neutrinos.
c) Mesons.
d) molecule.
2. Nuclear part of the atom is responsible for ......
a) Mass of the atom
b) Volume of the atom
c) Size of atom .
d) Orientation of orbital.
3.The Shape of S - orbital
is
a) Dumb - bell shape
b) Spherical shape
c) Double dumb - bell shape
d) Complicated shape
4. An f orbital can accommodate
a) 14 electrons.
b) 2 electrons.
c) 6 electrons.
d) 10 electrons.
5. The orbital quantum number of an atom discribes
a) Size of orbital.
b) Shape of
orbital.
c) Orientation of orbital.
d) Spin of electron.
6. Extra nuclear part of the atom is responsible for .....
a) Mass of the atom
b) Volume of the atom
c) Size of atom ..
d) Orientation of orbital.
7. The Shape of P - orbital is
a) Dumb - bell shape
b) Spherical shape
c) Double dumb - bell shape
d) Complicated shape
8."electron pairing in any orbital (s, p, d and f) cannot
take place until each orbital of the same sub-level contains one electron"
is a statement of ....
a) Aufbau principle
b)Pauli's exclusion principle
c)Hunds rules of
maximum multiplicity
d) Heisenberg uncertainty principle
9. The magnetic quantum number of an atom determines ......
a) Size of orbital.
b) Shape of orbital.
c) Orientation of
orbital.
d) Spin of electron.
10.Rutherford's
scattering experiments does not lead to the following conclusion ..........
a) Atom has largely empty space.
b) The center of the atom has positively charged nucleus.
c) The size of the nucleus is very small.
d) The electrons are
revolving around the nucleus.
11.Bohr's atomic model is based on the following postulations.
a) An atom consisting of
only nucleus.
b) An electron can rotate only in certain
energy levels.
c) An electron remains moving with continuous loss of
energy.
d) None of the above
12. Principal quantum number is proposed by
a) Sommerfeld
b) Rutherford
c) Bohr
d) Lande
13. Orbital quantum number is proposed by
a) Sommerfield
b) Rutherford
c) Bohr
d) Lande
14.Ground state electronic configuration of nitrogen atom can be
represented
a) 1s² 2s²2p¹
b) 1s 2s² 2p 3s!
c) 1s 2s 2p 3s 3p
d) 1s² 2s²2p5
15.Magnetic quantum number is proposed by ......
a) Sommerfeld
c) Bohr
b) Rutherford
d) Lande
16.A p - orbital can accommodate .....
a) 14 electrons.
b) 2 electrons.
c) 6 electrons.
d) 10 electrons.
17.The principal quantum number of an atom describes ......
a) Size of atom.
b) Shape of orbital.
c) Orientation of orbital.
d) Spin of electron.
18.When the azimuthal quantum number (1) is 1, m can have.
a) I value
b) 3 value
c) 5 value
d) 7 value
19.A S- orbital can accommodate
a) 14 electrons.
b) 2 electrons.
c) 6 electrons.
d) 10 electrons.
20.The Shape of d - orbital is.
a) Dumb - bell shape
b) Spherical shape
c) Double dumb - bell
shape
d) Complicated shape
21. Azimuthal quantum number of S orbital is .....
a) 0
b) 1
c) 2
d) 3
22.Azimuthal quantum number of P orbital is .....
a) 0
b) 1
c) 2
d) 3
23.Azimuthal quantum number of d orbital is ......
a) 0
c) 2
d) 3
b) 1
24."It is impossible to
specify at any given moment both the position and momentum (velocity) of an
electron" is a statement of .....
a) Aufbau principle
b) Pauli's exclusion principle
c) Hands rules of maximum multiplicity
d) Heisenberg
uncertainty principle
25.The value of (n + 1) of
2S- orbital is .....
a) 2
b) 3
c)4
d) 5
26.Maximum number of
electrons in p - orbital is.
a) 2
b) 14
c) 10
d) 6
27. Mathematical representation of Heisenberg uncertainty
principle is
a) Δx. Δp = h / 4t
bΔx. Δp = h
/ 2n
c) Δx. Δp = h
/ 6x
d) Δx. Δp = h
/ 5
28.Maximum number of
electrons in s - orbital is ......
a) 2
b) 14
c) 10
d) 6
29.Magnetic quantum numbers of
d - orbital lies from ...
a) -3 to +3
b) -2 to +2
c) -1 to +1
d) -2 to +3
30.The value of (n + 1) of
3p- orbital is.
a) 2
b) 3
c) 4
d) 5
31.Maximum number of
electrons in d - orbital is
a) 2
b) 14
c) 10
d) 6
32.Spin multiplicity for 2
electrons in p orbital is
a) 2
b) 3
c) 4
d ) 5
33.Maximum numbers of
electrons in K - shell are.....
a) 2
c) 18
8) S
d) 32
34.Maximum numbers of
electrons in L- shell are.....
a) 2
b) 8
c) 18
d) 32
35.Maximum numbers of
electrons in d orbital are......
a) 2
b) 10
c) 18
d) 32
36.Orbital quantum number of f - orbital lies from......
a) -3 to +3
b) -2 to +2
c) -1 to +1
d) -2 to +3
37.Maximum number of electrons
in f - orbital is.......
a) 2
b) 14
c) 10
d) 6
38.Spin multiplicity of 2p
'orbital is.
a) 2
b) 3
c) 4
d) 5
39. Which of the following
electronic configuration obey hunds rule?
a) 1S², 2s², 2px², 2py¹, 2pzo
b) 1S, 2s², 2px1,
2py¹, 2pz¹
c) 1s², 2s², 2px², 2py², 2pzo
d) IS², 2s¹, 2px², 2py ', 2pzo
40.Spin Multiplicity can be
calculated by
a) (2M + 1)
b) (2S + 1)
c) (2J + 1)
d) (2K + 1)
41.Which of the following represents the correct set of the four
quantum numbers of a 4d1electron?
a) n =4, l=2, m = -2,
S = 1/2
b) n=4, l=3, m = -2, S =
1/2
c) n = 4, l=1, m = -2, S = 1/2
d) n = 4, l=2, m = -3, S = 1/2
42.The correct set of the four quantum numbers of a 4P1
electron is
a) n =4, l=2, m = -1, S =
1/2
b) n=4, l=1, m =
-1 , S = 1/2
c) n =4, l=2, m = -2, S = 1/2
d) n = 4, 1 = 2, m = -3, S = 1/2
43.The correct set of the four quantum numbers of a 1S¹ electron
is ......
a) n = 1, l=0, m = 1, S = 1/2
b) n = 1, l=0, m = -1, S = 1/2
c) n = 1, l=0, m
= 0, S = 1/2
d) n = 1, l = 1, m = 0, S = 1/2
44."no two electrons an
atom, can have the same set of all four quantum numbers" is a statement of
......
a) Aufbau principle
b) Pauli's exclusion
principle
c) Hands rules of maximum multiplicity
d) Heisenberg uncertainty principle
45."Electrons are
added progressively to the various
orbitals in the order of increasing energy starting with the orbital of lowest
energy "is a statement of .....
a) Aufbau principle
b) Pauli's exclusion principle
c) Hands rules
d) Heisenberg uncertainty principle
46.Which of the following
postulate is correct according to Bohr's atomic model?
a) An electron
revolved around the nucleus in a circular orbit without emitting energy.
b) An electrons are situated at the center of the atom.
c) An electron revolved around the nucleus in a circular orbit
with continuously emitting energy
d) An electron jumps from a lower energy level to a higher
energy level without absorbing energy.
47.Which one the following
orbital is lower energy?
a) 4f
b) 5d
c) 6S
d) 6P
48.Which of the following is
correct statement of Rutherford's scattering experiment?
a) Atom has large empty space.
b) The center of the atom has a positively charged body called
as nucleus
c) The whole of the atomic mass is concentrated in the nucleus
d) All of the above.
Atomic Structure MCQ
s-Block
elements MCQ
Structure
And Bonding MCQ
