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MHT CET202615 April 2026Evening ShiftChemistrySolutionsActual

If a 0.4 molal solution of a nonvolatile solute in organic solvent decreases its freezing point by 2.4 K., then the molal depression constant of solvent will be

Options

  1. A3.0 K kg mol ⁻¹
  2. B4.0 K kg mol ⁻¹
  3. C5.0 K kg mol ⁻¹
  4. D6.0 K kg mol ⁻¹

Correct answer

D. 6.0 K kg mol ⁻¹

Step-by-step solution

Using the formula for depression in freezing point: T_f = K_f m Given T_f = 2.4 K and m = 0.4 mol kg ⁻¹ . Substituting the values: 2.4 = K_f 0.4 K_f = 2.4 0.4 = 6.0 K kg mol ⁻¹ Answer: 6.0 K kg mol ⁻¹

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