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 ?

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.

Tardigrade Admin · Accepted Answer

(Δ Tb)x > ( Δ Tb)y same solvent so, Kb is same m is same (given) ix . kb . m > iy . kb .m ⇒ iX > iy so, x is undergoing dissociation in water.

Q. The boiling point of $0.2 m o l k g^{- 1}$ 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 ?

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

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

X is undergoing dissociation in water

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

$(Δ T_{b})_{x} > (Δ T_{b})_{y}$
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.

Q. The boiling point of 0.2molkg−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 ?