Which of the following diffuses slowly?

S O_{2}

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N_{2}

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O_{2}

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C l_{2}

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Solution

The correct option is A $C l_{2}$
According to Graham's law of diffusion,
$r \propto \frac{1}{\sqrt{M}}$

Molecular weight of $S O_{2}, N_{2}, O_{2}, C l_{2}$ are respectively $64, 28, 32, 71$

The gas with high molecular weight diffuses slowly. Chlorine has the highest molecular mass among others.
Hence, option D is correct.

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