Pauli's Exclusion Principle and Hund's Rule NEET Questions

Physical Chemistry - Atomic Structure

Pauli's Exclusion Principle and Hund's Rule MCQ Questions


7.
The maximum number of electrons in the f subshell is:
A.
18
B.
6
C.
10
D.
14
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ANSWER :
D. 14
8.
Which of the following sets of quantum numbers is NOT permitted by Pauli's exclusion principle for two electrons in the same atom?
A.
(2, 1, 0, +½) and (2, 1, 0, +½)
B.
(2, 1, 0, +½) and (2, 1, 0, -½)
C.
(2, 1, 0, +½) and (2, 1, 1, +½)
D.
(1, 0, 0, +½) and (2, 0, 0, +½)
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ANSWER :
A. (2, 1, 0, +½) and (2, 1, 0, +½)
9.
For two electrons in the same orbital, which quantum number must necessarily differ?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (ml)
D.
Spin quantum number (ms)
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ANSWER :
D. Spin quantum number (ms)
10.
The maximum number of electrons in n=4 shell is:
A.
18
B.
8
C.
32
D.
50
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ANSWER :
C. 32
11.
The s subshell can hold a maximum of how many electrons?
A.
2
B.
4
C.
1
D.
6
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ANSWER :
A. 2
12.
Which of the following is an alternative statement of Pauli's exclusion principle?
A.
All electrons in an atom must have the same spin
B.
No more than three electrons can occupy the same orbital
C.
Electrons in the same orbital must have parallel spins
D.
Only two electrons may exist in the same orbital, and these must have opposite spins
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ANSWER :
D. Only two electrons may exist in the same orbital, and these must have opposite spins