Question

Assertion (A): When NaCl is added to water, a depression in freezing point is observed.
Reason (R): NaCl undergoes dissociation in water.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

Colligative properties, such as freezing point depression, depend on the number of solute particles in solution, not on their nature.

Answer 1

The Correct Option is B

The depression in freezing point is due to the colligative properties of the solution. Although NaCl dissociates in water, the depression in freezing point is not solely due to dissociation, but to the number of solute particles present.