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MHT CET202314 May 2023Evening ShiftChemistrySolutionsActual

A solution of nonvolatile solute is obtained by dissolving 15 ~g in 200 ~mL water has depression in freezing point 0.75 ~K . Calculate the molar mass of solute if cryoscopic constant of water is 1.86 ~K ~kg ~mol ⁻¹ .

Options

  1. A160 ~g ~mol ⁻¹
  2. B172 ~g ~mol ⁻¹
  3. C186 ~g ~mol ⁻¹
  4. D198 ~g ~mol ⁻¹

Correct answer

C. 186 ~g ~mol ⁻¹

Step-by-step solution

aligned M ₂ & = 1000 ~K _ f W ₂ T _ f W ₁ & = 1000 1.86 15 0.75 200 & =186 ~g ~mol ⁻¹ aligned

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