The boiling pointegral of 0.2 mol kg(^{-1}) solution of X in... | Chemistry | SolveeIt | Solveeit

Today, August 23

Question

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

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

B

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

C

X is undergoing dissociation in water

D

Molecular mass of X is greater then the molecular mass of Y.

Answer

X is undergoing dissociation in water

Explanation

Solution

${(\Delta T_b)_x > ( \Delta T_b)_y }$
same solvent so, ${K_b}$ is same
m is same (given)
$i_x . k_b . m > i_y . k_b .m \; \Rightarrow \; i_X > i_y$
so, x is undergoing dissociation in water.