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.
$(i)$ $0.10\, {M} \,{Ba}_{3}\left({PO}_{4}\right)_{2}$
$(ii)$ $0.10\, {M}\, {Na}_{2} {SO}_{4}$
$(iii)$ $0.10\, {M}\, {KCl}$
$(iv)$ $0.10 \,{M} \,{Li}_{3} {PO}_{4}$