Quantum Mechanical Approach to Covalent Bonding (Valence Bond Theory - its Important Features, the Concept of Hybridization involving s, p, and d Orbitals; Resonance ) NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Quantum Mechanical Approach to Covalent Bonding (Valence Bond Theory - its Important Features, the Concept of Hybridization involving s, p, and d Orbitals; Resonance ) MCQ Questions


1.
Valence bond theory was proposed by
A.
Heisenberg
B.
Pauling
C.
Hund
D.
Bohr
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ANSWER :
B. Pauling
2.
Which of the following species involves sp² hybridization at the central atom?

NEET - 2022

A.
BF₃
B.
CH₄
C.
BeCl₂
D.
PCl₅
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ANSWER :
A. BF₃
3.
In valence bond theory, a covalent bond is formed by
A.
Transfer of electrons
B.
Sharing of electron clouds
C.
Overlap of atomic orbitals
D.
Repulsion of nuclei
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ANSWER :
C. Overlap of atomic orbitals
4.
The condition for effective overlapping is
A.
Maximum energy difference
B.
Minimum overlapping
C.
Same phase and suitable orientation
D.
Different orbitals
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ANSWER :
C. Same phase and suitable orientation
5.
Which of the following does not show hybridization?
A.
H₂O
B.
BCl₃
C.
BeCl₂
D.
NaCl
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ANSWER :
D. NaCl
6.
The type of hybridization in CH₄ molecule is
A.
sp³
B.
sp²
C.
sp
D.
sp³d
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ANSWER :
A. sp³