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.
[ઉપયોગ : ${R}=0.083\, {~L}\, bar \,{mol}^{-1} \,{~K}^{-1}$ ]