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6 ~g of urea is dissolved in 90 ~g of water. Relative lowering of vapour pressure is

Options

  1. A0.02
  2. B0.2
  3. C0.002
  4. D0.04

Correct answer

A. 0.02

Step-by-step solution

p^ -p_ S p^ = w₂ M₁ M₂ w₁ Where, w₂ and M₂ are weight and molecular mass of solute. M₁ and w₁ are molecular mass and weight of solvent. p p^ = 6 60 18 90 = 1 50 =0.02

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