Which of the following gases will have the lowest rate of diffusion?

H_{2}

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N_{2}

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F_{2}

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O_{2}

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Solution

The correct option is B $H_{2}$
Rate of diffusion is inversely proportional to Molar mass,
So, rate of Diffusion: $H_{2} > N_{2} > O_{2} > F_{2}$
$F_{2}$ has lowest rate of diffusion.

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If both gases have same temperature so rate of diffusion of $O_{2}$ will be:

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