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Question

Under similar conditions which of the following gases to diffuse four times as quickly as oxygen?

A
He
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B
H2
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C
N2
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D
D2
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Solution

The correct option is D H2
Using graham's law of diffusion :

rgasrO2=MO2Mgas

4=32Mgas or 16=32Mgas

or Mgas=3216=2, i.e., H2

Hence, the correct option is B.

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