Elevation of boiling point

2015 AIPMT-I 1 question

1. 1 Solutions
   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
   Check Answer