Match List I with List II:

	List I		List II
(A)	$3$ Translational degrees of freedom	(I)	Monoatomic gases
(B)	$3$ Translational, $2$ rotational degrees of freedoms	(II)	Polyatomic gases
(C)	$3$ Translational, $2$ rotational and $1$ vibrational degrees of freedom	(III)	Rigid diatomic gases
(D)	$3$ Translational, $3$ rotational and more than one vibrational degrees of freedom	(IV)	Nonrigid diatomic gases

Choose the correct answer from the options given below:

Using equipartition of energy, the specific heat (in $\mathrm{J}\mathrm{ }{\mathrm{kg}}^{-1}\mathrm{ }{\mathrm{K}}^{-1}$ ) of Aluminium at high temperature can be estimated to be (atomic weight of Aluminium $=27$)

Match the $\frac{{\text{C}}_{\text{p}}}{{\text{C}}_{\text{v}}}$ ratio for ideal gases with different type of molecules:

Given below are two statements:

Statement I: In a diatomic molecule, the rotational energy at a given temperature obeys Maxwell's distribution.

Statement II : In a diatomic molecule, the rotational energy at a given temperature equals the translational kinetic energy for each molecule.

In the light of the above statements, choose the correct answer from the options given below:

Consider a gas of triatomic molecules. The molecules  are assumed to be triangular and made of massless rigid rods whose vertices are occupied by atoms. The internal energy of a mole of the gas at temperature T is: