Statement I : The number of degrees of freedom of triatomic non linear molecule is 6.
Statement II : Triatomic nonlinear molecules have three translational degrees of freedom and three rotational degrees of freedom.

Moderate

A

If both statement I and statement II are true and statement II is the correct explanation of statement I.
B

If both statement I and statement II are true but statement II is not the correct explanation of statement I.
C

If statement I is true but statement II is false
D

If both statement I and statement II are false

Solution

A triatomic molecule can bodily move along a straight line . Also it can rotate about an axis . For nonlinear triatomic molecule moment of inertia is not zero about any axis and hence rotational kinetic energy is not zero about any axis,If an ideal gas contains a very large number of triatomic nonlinear molecules , the molecules have three translational and three rotational degrees of freedom .

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