Question 53
Assertion (A) When NaCl is added to water a depression in freezing point is observed.
Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.

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Solution

(a) Assertion and reason both are correct and reason is correct explanation of assertion. When NaCl is added to water a depression in freezing point is observed. This is due to lowering of vapour pressure of a solution. Lowering of vapour pressure is observed due to intermolecular interaction of solvent-solute particles.

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Question 53 Assertion (A) When NaCl is added to water a depression in freezing point is observed. Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.

Question 53
Assertion (A) When NaCl is added to water a depression in freezing point is observed.
Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.