A graph of vapour pressure and temperature for
Question:

A graph of vapour pressure and temperature for three different liquids $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ is shown below :

(A) $\mathrm{X}$ has higher intermolecular interactions compared to $\mathrm{Y}$.

(B) X has lower intermolecular interactions compared to $\mathrm{Y}$.

(C) $\mathrm{Z}$ has lower intermolecular interactions compared to $\mathrm{Y}$.

The correct inference(s) is/are :

1. $\mathrm{A}$

2. (C)

3. (B)

4. (A) and (C)

Correct Option: , 3

Solution:

Order of B.P. is : $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$

Order of vapour pressure $: \mathrm{Z}<\mathrm{Y}<\mathrm{X}$

order of intermolecular interaction : $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$.