Q. The number of transitional degrees of freedom for a diatomic gas is

 2617  204 AIPMTAIPMT 1993 Report Error

Solution:

Number of degree of freedom d=3N−1
where N is the number of atoms in a molecules
In diatomic molecules, N=2
⟹ d=3(2)−1=5
Hence diatomic molecule has 5 degrees of freedom (3 translational and 2 rotational).