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Q.

Which pair of gases has the same average rate of diffusion at $25^{0}$ C ?

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a

He and Ne

b

$N_{2} O$ and $C O_{2}$

c

$N H_{3}$ and $H C l$

d

$N_{2}$ and $O_{2}$

answer is C.

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Detailed Solution

$N_{2} O$ and $C O_{2}$ have same molecular weight.

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