Question

Which of the following statements is false?

• A. Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.
• B. The osmotic pressure of a solution is given by the equation $\pi = CRT$ (where $C$ is the molarity of the solution).
• C. Decreasing order of osmotic pressure for $0.01 \,M$ aqueous solutions of barium chloride, potassium chloride, acetic acid and sucrose is $BaCl_2 > KCl > CH_3COOH >$ sucrose.
• D. According to Raoult?? law, the vapour pressure exerted by a volatile component of a solution is directly proportional to its mole fraction in the solution.

Answer 1

Answer: (A)

Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.

Answer 2

The value of $K_f$ depends upon the nature of the solvent. Thus, two different solutions of sucrose of same molality prepared in different solvents will have the different depression in freezing point.

So, the correct option is (A).