Assertion :Greater the value of van der Waals constant 'a', easier is the liquefaction of a gas. Reason: 'a' indirectly measures the magnitude of attractive forces between the molecules.

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 case of liquification of a gas depends on their inter-molecular force and attraction which in turn is measured in terms of vander waal's constant $a .$
Hence, higher the value of $a,$ greater the inter-molecular force of attraction, easier the liquification.

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