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

Physical Chemistry - Atomic Structure

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


13.
The maximum number of electrons that can have n = 3 and l = 1 is:
A.
2
B.
6
C.
10
D.
14
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ANSWER :
B. 6
14.
Which element follows Hundā€™s rule but violates Aufbau principle?

NEET - 2018

A.
Cu
B.
Cr
C.
Mn
D.
Zn
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ANSWER :
A. Cu
15.
According to Pauliā€™s exclusion principle, how must electrons in the same orbital be arranged?
A.
Parallel spin
B.
Opposite spin
C.
Random spin
D.
Any orientation
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ANSWER :
B. Opposite spin
16.
Which electron configuration follows both Pauliā€™s exclusion principle and Hundā€™s rule?
A.
[Ne] 3sĀ² 3pā¶ 4sĀ¹
B.
[Ne] 3sĀ² 3pā¶ 4sĀ²
C.
[Ne] 3sĀ² 3pĀ³
D.
[Ar] 3dā“ 4sĀ²
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ANSWER :
C. [Ne] 3sĀ² 3pĀ³
17.
Which quantum number distinguishes electrons in the same orbital?
A.
Principal (n)
B.
Azimuthal (l)
C.
Magnetic (m)
D.
Spin (s)
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ANSWER :
D. Spin (s)
18.
Hundā€™s rule ensures:
A.
Maximum unpaired electrons
B.
Minimum unpaired electrons
C.
Pairing before orbital filling
D.
None of these
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ANSWER :
A. Maximum unpaired electrons