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The boiling point of 0.2   m o l   k g - 1 solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?

Options

  1. AX is undergoing dissociation in water
  2. BMolecular mass of X is greater than the molecular mass of Y.
  3. CMolecular mass of X is less than the molecular mass of Y.
  4. DY is undergoing dissociation in water while X undergoes no change

Correct answer

A. X is undergoing dissociation in water

Step-by-step solution

∆ T b = i   K b . m K b & m are constant for solutions of X and Y. ∆ T b is greater for solution of X implies i (Van't Hoff factor for X > 1) i.e X undergoes dissociation.

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