The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is BaCl₂ > KCl > CH₃COOH > sucrose.
The osmotic pressure (π) of a solution is given by π = MRT, where M is the molarity of the solution.
Raoult’s law states that the vapour pressure of a component over a solution is proportional to its mole fraction.
Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression.
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The Correct Option isD
Solution and Explanation
- (A) Correct: Osmotic pressure π = iMRT; BaCl₂ dissociates most.
- (B) Correct: This is the van’t Hoff equation.
- (C) Correct: Raoult’s law definition.
- (D) False: Freezing point depression depends on the cryoscopic constant of the solvent, which varies for different solvents.