Vapour pressure of ${\mathrm{CCl}}_4$ at ${25}^{\circ }\mathrm{C}\text{ is }143 \mathrm{mm} \mathrm{Hg}.0.5\mathrm{g}$ of a non-volatile solute $\left(\text{ molar mass }=65{\mathrm{mol}}^{-1}\right)$ is dissolved in 100 mL of ${\mathrm{CCl}}_4(\text{ density }=1.538\mathrm{g}\left.m{L}^{-1}\right)$ Vapour pressure of solution is :