At $35^{\circ} \mathrm{C}$, the vapour pressure of $\mathrm{CS}_{2}$ is $512 \mathrm{~mm}$ $\mathrm{Hg}$ and that of acetone is $344 \mathrm{~mm} \mathrm{Hg} . \mathrm{A}$ solution of $\mathrm{CS}_{2}$ in acetone has a total vapour pressure of $600 \mathrm{~mm} \mathrm{Hg}$. The false statement amongst the following is :
Correct Option: , 3
The vapour pressure of mixture $(=600 \mathrm{~mm} \mathrm{Hg})$ is greater than the individual vapour pressure of its constituents (Vapour pressure of $\mathrm{CS}_{2}=$ $512 \mathrm{~mm} \mathrm{Hg}$, acetone $=344 \mathrm{~mm} \mathrm{Hg}$. Hence, the solution formed shows positive deviation from Raoult's law.
$\Rightarrow(1) \Delta_{\text {Sol }} H>0$, (2) Raoult's law is not obeyed
(3) $\Delta_{\text {sol. }}$ Volume $>0$
(4) $\mathrm{CS}_{2}$ and Acetone are less attracted to each ether than to themselves.
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.