Assertion :A non volatile solute is mixed in a solution then elevation in boiling point and depression in freezing point both are $2 K$ . Reason: Elevation in boiling point and depression in freezing point both depend on melting point of non-volatile solute.

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 D Both Assertion and Reason are incorrect
Elevation in boiling point $(△ T_{b}) = K_{b} \times m$

Depression in freezing point $(△ T_{f}) = K_{f} \times m$ .

Elevation in boiling point and depression in freezing points are colligative properties i.e., they depend only on the number of particles of the solute.

Value of $K_{b}$ and $K_{f}$ are different, so $△ T_{b}$ and $△ T_{f}$ are also different.

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Assertion :A non volatile solute is mixed in a solution then elevation in boiling point and depression in freezing point both are 2K. Reason: Elevation in boiling point and depression in freezing point both depend on melting point of non-volatile solute.

Assertion :A non volatile solute is mixed in a solution then elevation in boiling point and depression in freezing point both are $2 K$ . Reason: Elevation in boiling point and depression in freezing point both depend on melting point of non-volatile solute.