c
The vapour pressure of mixture $(=600\; \mathrm{mm} \;\mathrm{Hg}$ ) is greater than the individual vapour pressure of its constituents (Vapour pressure of $\mathrm{CS}_{2}=512\; \mathrm{mm}\; Hg$, acetone $=344 \;\mathrm{mm}\; Hg$ ). Hence, the solution formed shows positive deviation
from Raoult's law.
$\Rightarrow(1) \Delta_{\mathrm{sol}} \mathrm{H}>0$
$(2)$ 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.