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MHT CET20239 May 2023Morning ShiftChemistrySolutionsActual

A solution of nonvolatile solute is obtained by dissolving 3.5 ~g in 100 ~g solvent has boiling point elevation 0.35 ~K . Calculate the molar mass of solute. ( . Molal elevation constant .=2.5 ~K ~kg ~mol ⁻¹ )

Options

  1. A270 ~g ~mol ⁻¹
  2. B260 ~g ~mol ⁻¹
  3. C250 ~g ~mol ⁻¹
  4. D240 ~g ~mol ⁻¹

Correct answer

C. 250 ~g ~mol ⁻¹

Step-by-step solution

M ₂= K _ b W ₂ 1000 T _ b W ₁ = 2.5 3.5 1000 0.35 100 =250 ~g ~mol ⁻¹

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