Published by:
CGP EDU Academic Team
Published on: August 22, 2026
The specific heats, 
and 
of a gas of diatomic molecules, 
, are given (in units of 
) by 29 and 22, respectively. Another gas of diatomic molecules 
, has the corresponding values 30 and 21 . If they are treated as ideal gases, then: -
A
has one vibrational mode and 
has two
B
Both 
and 
have a vibrational mode each
and have a vibrational mode each
C
is rigid but 
has a vibrational mode
D
A has a vibrational mode but 
has none
has none
Text Solution
Verified by ExpertsThe correct answer is:
D
For A:
It gives 
(3 translational, 2 rotational and 1 vibrational)
For B:
(3 translational, 2 rotational, no vibrational)
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