JEE MAIN - Chemistry (2004 - No. 32)
Which one of the following statements is false?
Raoult’s law states that the vapour pressure of a components 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
The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is
BaCl2 > KCl > CH3COOH > sucrose
The osmotic pressure ($$\pi$$) = MRT, where M is the molarity of the solution
Spiegazione
$$\Delta {T_f} = {K_f} \times m \times i.$$ Since $${K_f}$$ has different values for different solvents, hence even if the $$m$$ is the same $$\Delta {T_f}$$ will be different