First slide

Theory of dilute solutions

Question

${HgI}_{2}$ is added to aqueous KI solution, then the vapour pressure of new solution is,

Easy

A

Increases
B

Decreases
C

remains same
D

First increase then decrease

Solution

If ${HgI}_{2}$ is added to $K I_{(a g)}$ solution, the vapour pressure of new solution increases due to decrease in number of particles. $2 KI + {HgI}_{2} \to K_{2} [H g I_{4}]$

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