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Azeotropic Mixtures

0.5 mol of ea...

Question

$0.5 m o l$ of each of $H_{2}, S O_{2} a n d C H_{4}$ are kept in a container. A hole was made in the container. After 3 hours, the order of partial pressures in the container will be:

A

p_{H_{2}} > p_{S O_{2}} > p_{C H_{4}}

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B

p_{H_{2}} > p_{C H_{4}} > p_{S O_{2}}

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C

p_{S O_{2}} > p_{H_{2}} > p_{C H_{4}}

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D

p_{S O_{2}} > p_{C H_{4}} > p_{H_{2}}

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Solution

The correct option is D $p_{S O_{2}} > p_{C H_{4}} > p_{H_{2}}$
$Rate of diffusion \propto \frac{1}{\sqrt{Molecular mass}}$
Order of diffusion:
$H_{2} > C H_{4} > S O_{2}$
and amount left is in the order,
$S O_{2} > C H_{4} > H_{2}$
Hence, order of partial pressure is,
$p_{S O_{2}} > p_{C H_{4}} > p_{H_{2}}$

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