Assertion :The solubility of n-alcohol in water decreases with an increase in molecular weight. Reason: The reactive proportion of the hydrocarbon part in alcohols increases with increasing molecular weight which permits enhanced hydrogen bonding with water.

Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I.

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Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I.

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Statement I is true; Statement II is false.

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Statement I is false; Statement II is true.

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Solution

The correct option is C Statement I is true; Statement II is false.
As the molecular weight increases, non-polar part increases and solubility decreases. So, Statement I in correct. Statement II is incorrect because hydrogen bonding is not affected by an increase in the non-polar part.

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