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NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
Solutions

NEET 2015 · Chemistry · Solutions

The boiling point of 0.2molk g ^ - 1 solution of X in water is...

The boiling point of 0.2molkg−10.2molk{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

∆Tb=iKb.m∆ {T}_{b} = i{K}_{b} . m

Kb{K}_{b} & m are constant for solutions of X and Y. ∆Tb∆ {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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