First slide

Gaseous state

Question

Which has maximum value of mean free path?

Moderate

A

CO₂
B

H₂
C

O₂
D

N₂

Solution

$λ (mean free path) = \frac{1}{\sqrt{2} {πσ}^{2} N}$
$where. σ is the collision diameter.$
$∴ λ \propto \frac{1}{σ^{2}}$
$H_{2} is smallest in size.$

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