Chemistry - Biomolecules Question with Solution | TestHub

The freezing point depression depends on the molal depression constant ($K_f$) of the solvent. Since $K_f$ is different for different solvents, two sucrose solutions of the same molality in different solvents will have different freezing point depressions.

The correct order of osmotic pressure for 0.01 M aqueous solutions is $\mathrm{BaC}{\mathrm{l}}_2>\mathrm{KCl}>\mathrm{C}{\mathrm{H}}_3\mathrm{COOH}>sucrose$. This is because osmotic pressure ($\pi =iMRT$) depends on the van't Hoff factor ($i$).

For $\mathrm{BaC}{\mathrm{l}}_2$, $i\approx 3$.

For $\mathrm{KCl}$, $i\approx 2$.

For $\mathrm{C}{\mathrm{H}}_3\mathrm{COOH}$, $i$ is between 1 and 2 (weak electrolyte).

For sucrose, $i=1$ (non-electrolyte).