Question

For a gas, \( \frac{R}{C_V} = 0.4 \), where \( R \) is universal gas constant and \( C_V \) is the molar specific heat at constant volume. The gas is made up of molecules which are

• A. polyatomic.
• B. rigid diatomic.
• C. non-rigid diatomic.
• D. monoatomic.

Hint:

When the ratio \( \frac{R}{C_V} \) is specific, it helps identify the type of molecule in the gas based on its degrees of freedom.

Answer 1

The Correct Option is B

Step 1: Understanding the relation.
The relation \( \frac{R}{C_V} = 0.4 \) suggests that the gas behaves like a diatomic gas with rigid molecules. For a monoatomic gas, the ratio \( \frac{R}{C_V} \) would be different, and polyatomic or non-rigid diatomic gases would also show different values for this ratio.
Step 2: Conclusion.
Thus, the correct answer is (B) rigid diatomic.