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Heat and Thermodynamics question

2019 · 9 Apr · Shift 2 · Q55
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Heat and Thermodynamics question

2019 · 9 Apr · Shift 2 · Q55

JEE MainPhysicsHeat and ThermodynamicsMCQ+4 / −1
The specific heats, CP and CV of a gas of diatomic molecules, A, are given (in units of J mol–1 K–1) by 29 and 22, respectively. Another gas of diatomic molecules, B, has the corresponding values 30 and 21. If they are treated as ideal gases, then :-
  1. A
    A is rigid but B has a vibrational mode
  2. B
    A has a vibrational mode but B has none
  3. C
    A has one vibrational mode and B has two
  4. D
    Both A and B have a vibrational mode each
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