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  4. If for a gas (R/CV) =0.67, this gas is made up of molecules which are

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Q. If for a gas $\frac{R}{C_{V}} =0.67$, this gas is made up of molecules which are

Kinetic Theory

Solution:

For a gas, we know $\frac{R}{C_{V}} = \gamma - 1$
or $\quad0.67 = \gamma - 1$ or, $\gamma = 1.67$
Hence the gas is monatomic.