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Q.

The boiling point of 0.2 mol kg-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?

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a

X  is undergoing dissociation in water. 

b

Y is undergoing dissociation in water while X undergoes no change.

c

Molecular mass of  X is less than the molecular mass of Y 

d

Molecular mass of X is greater than the molecular mass of Y

answer is C.

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Detailed Solution

ΔTb=iKbm

For equimolal solutions, elevation in boiling point will be higher if solution undergoes dissociation i.e., i > 1.

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