Assertion :A mixture of hydrogen and sulphur dioxide gas can be separated using a method of diffusion. Reason: Diffusion is a method of separation by which two gases with greater difference in their densities are separated.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The density of hydrogen is less than that of sulphur dioxide and hence, according to Graham's law of diffusion, its rate of diffusion will be larger than that of sulphur dioxide. Hence using the method of diffusion, hydrogen gas can be collected due to its higher rate of diffusion leaving sulphur dioxide behind

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