Chemistry - Liquid Solution Question with Solution | TestHub

${\mathrm{\Delta T}}_{\mathrm{f}}={\mathrm{ik}}_{\mathrm{f}}\mathrm{m}$

As $\mathrm{m}$ is the same for all solutions so ${\mathrm{\Delta T}}_{\mathrm{f}}$ depends on Van't Hoff factor (i). Greater is i small is freezing point.

$\begin{array}{|ll|}\hline \text{ Compound }& \text{ i }\\ {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}& 1\\ {\mathrm{Ba}}_3{\left({\mathrm{PO}}_4\right)}_2& 5\\ {\mathrm{Na}}_2{\mathrm{SO}}_4& 3\\ \mathrm{KCl}& 2\\ {\mathrm{Li}}_3{\mathrm{PO}}_4& 4\\ \hline\end{array}$

So the given solutions have a lower freezing point than ethanol.