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JEE · NEET Previous Year Question

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

Topic: NEET PYQ

Answer: C. Full step-by-step solution below.

A $diatomic$
B $mixture of diatomic and polyatomic molecules$
C $monoatomic$
D $polyatomic$

Correct answer: C

Solution

(c) Since \frac{R}{C _{V}} = 0.67 \Rightarrow \frac{c _{P} - c _{V}}{C _{V}} = 0.67 \Rightarrow γ = 1.67 = \frac{5}{3} Hence gas is monoatomic.

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