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 ?

Options

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.

Answer

A

Explanation

`(Delta T_(b))_(x)gt (Delta T_(b))_(y)`
same solvent so, `K_(b)` is same
m is same (given)
`i_(x).K_(b).m gt i_(y).K_(b).m rArr i_(x)gt i_(y)`
so, X is undergoing dissociation in water.