Assertion :Molar enthalpy of vaporisation of water is different from ethanol. Reason: Water is more polar than ethanol.

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Molar heat of vapourisation of water is more than ethanol because of the presence of stronger H-bonding in water as compared to ethanol.

It is also true that water is more polar than ethanol but it's not the explanation for the assertion.

Hence, option B is correct

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