Consider 0.1m- aqueous solutions of two solutes X and Y. The solute X behaves as a univalent electro — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Solute X (univalent electrolyte like NaCl) dissociates into 2 ions, so $i \approx 2$. Solute Y dimerizes, so $i \approx 0.5$. Since $i_X > i_Y$, the effective particle concentration is greater for X. Consequently, solution X has a greater elevation in boiling point (higher boiling point) and greater osmotic pressure. It also has a greater depression in freezing point, meaning its actual freezing point is *lower* than Y's (making c incorrect). The relative lowering of vapour pressure is proportional to $i$, so they are not the same (making d incorrect). Therefore, correct answer is A,B.