If the above solutions are mixed to prepare two solutions and , in the ratio 2:3 and 3:2, by volume, — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Let concentration of B be $C$, so concentration of A is $3C$. In mixture $S_1$ (ratio 2:3), effective concentration is proportional to $2(3C) + 3(C) = 9C$. In mixture $S_2$ (ratio 3:2), effective concentration is proportional to $3(3C) + 2(C) = 11C$. The ratio of their freezing point depressions depends on their effective concentrations, giving 9:11. Therefore, correct answer is C.