Which one of the following statements is incorrect?

Which one of the following statements is incorrect?
  1. The correct order of osmotic pressure for $0.01 \mathrm{M}$ aqueous solution of each compound is $\mathrm{BaCl}_{2}>\mathrm{KCl}>\mathrm{CH}_{3} \mathrm{COOH}>$ Sucrose
  2. The osmotic pressure $(\pi)$ of a solution is given by the equation $\pi=\mathrm{MRT}$, where $\mathrm{M}$ is the molarity of the solution
  3. Raoult's law states that the vapour pressure of a component over a solution is proportional to its mole fraction
  4. Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression

Solution

($\Delta \mathrm{T}_{\mathrm{f}}=\mathrm{K}_{\mathrm{f}} \times \mathrm{m} \times \mathrm{i}$.
Since $\mathrm{K}_{\mathrm{f}}$ has different values for different solvents, hence even if $m$ is the same $\Delta \mathrm{T}_{\mathrm{f}}$ will be different ,

Asked in: JEE-TOPICTESTS-CHEMISTRY

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