Assertion : The number of degrees of freedom of triatomic molecules is `6` Reason : Triatomic molecules have three translational degrees of freedom and three rotational degrees of freedom.A. If both assertion and reason are true and the reason is correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true, but the reason is false.D. If assertion is false but the reason is true

Assertion : The number of degrees of freedom of triatomic molecules is

1.	Assertion : The number of degrees of freedom of triatomic molecules is `6` Reason : Triatomic molecules have three translational degrees of freedom and three rotational degrees of freedom.A. If both assertion and reason are true and the reason is correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true, but the reason is false.D. If assertion is false but the reason is true
Answer» Correct Answer - A We know that for a diatomic gas `C_(v)=3R, C_(P)=4R` `:. Gamma = (C_P)/(C_v) = 4/3` But `gamma=1+2/f` so , `1+2/f=4/3implies 2/f = 4/3-1=1/3` `f=6` Tus, option (a) is correct.

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