Hydrogen Bonding and its Applications NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Hydrogen Bonding and its Applications MCQ Questions


1.
Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom and is simultaneously attracted to another electronegative atom. Which set of atoms is most commonly involved in hydrogen bonding?
A.
F, O, N
B.
B, Si, As
C.
C, S, P
D.
Cl, Br, I
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ANSWER :
A. F, O, N
2.
The strength of a typical hydrogen bond lies in the range of:
A.
500–1000 kJ/mol
B.
100–500 kJ/mol
C.
10–40 kJ/mol
D.
0.1–1 kJ/mol
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ANSWER :
C. 10–40 kJ/mol
3.
Which of the following compounds exhibits the STRONGEST hydrogen bonding?
A.
HCl
B.
HF
C.
HBr
D.
HI
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ANSWER :
B. HF
4.
Water has an unusually high boiling point (100°C) compared to H₂S (–60°C) primarily because:
A.
Water molecules form extensive intermolecular hydrogen bonds, which require additional energy to break
B.
Water has lower density than H₂S
C.
Water has stronger covalent O–H bonds than the S–H bonds in H₂S
D.
Water has a higher molecular mass than H₂S
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ANSWER :
A. Water molecules form extensive intermolecular hydrogen bonds, which require additional energy to break
5.
Which of the following is an example of INTRAMOLECULAR hydrogen bonding?
A.
o-Nitrophenol
B.
Ammonia
C.
Water
D.
p-Nitrophenol
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ANSWER :
A. o-Nitrophenol
6.
Among o-nitrophenol, m-nitrophenol, and p-nitrophenol, which has the LOWEST boiling point?
A.
o-Nitrophenol
B.
m-Nitrophenol
C.
p-Nitrophenol
D.
All three have identical boiling points
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ANSWER :
A. o-Nitrophenol