Question

Assertion: Depression of freezing point is a colligative property.

Reason: The depression of freezing point for a solution is directly proportional to the molality of the solution.

विकल्प

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

Explanation:

Depression of freezing point is a colligative property because it depends only on the number of solute particles, not their nature. It is directly proportional to the molality of the solution, as given by the formula ΔT_f = K_f m. Therefore, the reason correctly explains the assertion.