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Question: Answered & Verified by Expert
Which one of the following statements is false?
ChemistrySolutionsBITSATBITSAT 2009
Options:
  • A The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is $\mathrm{BaCl}_{2}>\mathrm{KCl}>\mathrm{CH}_{3} \mathrm{COOH}>$ sucrose.
  • B The osmotic pressure $(\pi)$ of a solution is given by the equation $\pi=\mathrm{MRT}$, where $\mathrm{M}$ is the molarity of the solution.
  • C Raoult's law states that the vapour pressure of a component over a solution is proportional to its mole fraction.
  • D Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression.
Solution:
2979 Upvotes Verified Answer
The correct answer is: Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression.
$\Delta \mathrm{T}_{\mathrm{f}}=\mathrm{K}_{\mathrm{f}} \times \mathrm{m} \times \mathrm{i}$. Since $\mathrm{K}_{\mathrm{f}}$ has different values
for different solvents, hence even if the $\mathrm{m}$ is the same $\Delta \mathrm{T}_{\mathrm{f}}$ will be different.

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