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MHT CET20225 Aug 2022Morning ShiftChemistrySolutionsActual

What is the molar mass of solute when 2.3 gram non-volatile solute dissolved in 46 gram benzene at 30^ C ? (Relative lowering of vapour pressure is 0.06 and molar mass of benzene is 78 gram mol ⁻¹ )

Options

  1. A65 gram mol ⁻¹
  2. B80 gram mol ⁻¹
  3. C72 gram mol ⁻¹
  4. D48 gram mol ⁻¹

Correct answer

A. 65 gram mol ⁻¹

Step-by-step solution

aligned & P P _ A ^0 = n _ B n _ A = W _ B M _ B M _ A W _ A & 0.06= 2.3 M _ B 78 46 aligned M_B=65

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