Q 11-12-024NEETJEE MainEasy
The internal energy of one mole of a rigid diatomic ideal gas at temperature $T$ is
Answer: (B) $\dfrac{5}{2}RT$
A rigid diatomic molecule has $5$ degrees of freedom ($3$ translational, $2$ rotational), each with $\dfrac{1}{2}RT$ per mole.
$U = \dfrac{5}{2}RT$.
Solution by Sreeraj P, M.Sc Physics