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Physics · PYQ NEET UG 2026
हिन्दीAn ideal gas is made of polyatomic molecules. Each of the molecules has three translational, three rotational and \( f \) number of vibrational modes. If the ratio of heat capacities \( C_P/C_V \) of the gas is \( 8/7 \), then the value of \( f \) is :
Correct answer · Option 3
2
Explanation
Using \( \gamma = 1 + \frac{2}{3 + 3 + f} \), substituting \( 8/7 \) for \( C_P/C_V \) gives \( f = 2 \).
