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

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

1.
Pauli's exclusion principle states that:
A.
No two electrons can have the same set of quantum numbers
B.
Only one electron can occupy an orbital
C.
Maximum two electrons can exist in an orbital
D.
No electron can have a negative spin
ANSWER :
A. No two electrons can have the same set of quantum numbers
2.
Hund's rule states that:
A.
Electrons pair only after all orbitals in a subshell are singly occupied
B.
Each electron must have opposite spin
C.
Lower energy orbitals fill first
D.
An orbital can have more than two electrons
ANSWER :
A. Electrons pair only after all orbitals in a subshell are singly occupied
3.
Which of the following correctly explains Hund’s rule?
A.
Maximum multiplicity
B.
Minimum energy rule
C.
Quantum number conservation
D.
None of these
ANSWER :
A. Maximum multiplicity
4.
Which element follows Hund’s rule correctly?
A.
C
B.
Fe
C.
Ca
D.
Zn
ANSWER :
B. Fe
5.
According to Pauli's exclusion principle, how many electrons can occupy an orbital?
A.
1
B.
2
C.
3
D.
4
ANSWER :
B. 2
6.
Which of the following is an incorrect electron configuration?
A.
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
B.
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²
C.
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s²
D.
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁹
ANSWER :
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁹