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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?
A
X is undergoing dissociation in water
B
Molecular mass of X is greater than the molecular mass of Y
C
Molecular mass of X is less than the molecular mass of Y
D
Y is undergoing dissociation in water, while X undergoes no change
Detailed Solution
$\Delta T_b = iK_bm$
The molality is the same, so a higher boiling point for X means a larger van't Hoff factor i.
So X undergoes dissociation in water.
The molality is the same, so a higher boiling point for X means a larger van't Hoff factor i.
So X undergoes dissociation in water.