Which of the following expressions gives the correct formula for the freezing point depression of an ideal dilute solution?

medium MCQ 1 mark Class 12 · Chemistry · Solutions

Answer

Δ T_{f} = K_{f} \times m

The correct answer is A) $Δ T_{f} = K_{f} \times m$ — Select the correct option A.

Step-by-step solution

Identify that the correct freezing point depression equation involves the cryoscopic constant $K_{f}$ and the molality $m$ of the solution.
Check each option: A) $Δ T_{f} = K_{f} \times m$ – correct form. B) $Δ T_{f} = K_{f} / m$ – incorrect. C) $Δ T_{f} = m / K_{f}$ – incorrect. D) $Δ T_{f} = K_{f} \times m^{2}$ – incorrect.
Select the correct option A.

Common mistake: Confusing boiling point elevation with freezing point depression

Concept tested: Freezing point depression formula

Published 10 September 2026 · Last updated 16 September 2026 · How this solution was prepared and checked