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JEE · NEET Previous Year Question

$The mean free path l for a gas molecule depends upon diameter, d of the molecule as [NEET 2020]$

Topic: NEET PYQ

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

A $l \propto \frac{1}{d ^{2}}$
B $l \propto d$
C $l \propto d^{2}$
D $1 \propto \frac{1}{d}$

Correct answer: A

Solution

(a) The mean free path l for a gas molecule is given as l = \frac{1}{2 πn d ^{2}} \Rightarrow l \propto \frac{1}{d ^{2}} where, d = diameter of molecule of gas.

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