Assertion(A): At a given temperature, vapor pressure of an aqueous solution of glucose is lower than that of water.
Reason (R): When a non-volatile solute is dissolved in water, the fraction of surface covered by the solvent molecules is reduced.

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The assertion is correct, but the reason is false.

Both assertion and reason are true and reason is the correct explanation of the assertion.

Both assertion and reason are false.

Both assertion and reason are true and reason is not the correct explanation of assertion.

answer is A.

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Detailed Solution

When a non-volatile solute is dissolved in water, the fraction of surface covered by the solvent molecules is reduced and the resulting number of molecules evaporating decreases. Vapor pressure decreases.

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