Vapour pressure of chloroform ( CHCl_3) and dichloromethane ( CH_2 Cl_2) at 25^° C are 200 mmHg and 41.5 mmHg respectively. Vapour pressure of the…

Vapour pressure of chloroform $\displaystyle \left(\mathrm{CHCl}_3\right)$ and dichloromethane $\displaystyle \left(\mathrm{CH}_2 \mathrm{Cl}_2\right)$ at $\displaystyle 25^{\circ} \mathrm{C}$ are $\displaystyle 200$ mmHg and $\displaystyle 41.5$ mmHg respectively. Vapour pressure of the solution obtained by mixing $\displaystyle 25.5$ g of $\displaystyle \mathrm{CHCl}_3$ and $\displaystyle 40$ g of $\displaystyle \mathrm{CH}_2 \mathrm{Cl}_2$ at the same temperature will be : (Molecular mass of $\displaystyle \mathrm{CHCl}_3=119.5 \mathrm{u}$ and molecular mass of $\displaystyle \mathrm{CH}_2 \mathrm{Cl}_2=85 \mathrm{u}$ )