Which one of the following statements is fals | vedclass

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(D) $1$. Raoult's law states that the partial vapour pressure of each component in a solution is directly proportional to its mole fraction,which is a

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

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(D) $1$. Raoult's law states that the partial vapour pressure of each component in a solution is directly proportional to its mole fraction,which is a correct statement.$2$. The osmotic pressure formula is $\pi = iCRT$,where $i$ is the van't Hoff factor,$C$ is molarity,$R$ is the gas constant,and $T$ is temperature. This is correct.$3$. Osmotic pressure is a colligative property depending on the number of particles. For $0.02 \ M$ solutions: $SrCl_2$ $(i=3)$,$NaCl$ $(i=2)$,$HCOOH$ $(i \approx 1)$,$Sucrose$ $(i=1)$. Thus,$SrCl_2 > NaCl > HCOOH > Sucrose$ is correct.$4$. Freezing point depression is given by $\Delta T_f = K_f 	imes m$. Since $K_f$ (cryoscopic constant) is a characteristic property of the solvent,different solvents have different $K_f$ values. Therefore,two solutions of the same molality in different solvents will have different freezing point depressions. This statement is false.

Which one of the following statements is false?

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Assertion : If one component of a solution obeys Raoult's law over a certain range of composition,the other component will not obey Henry's law in that range.
Reason : Raoult's law is a special case of Henry's law.

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At $40\,^oC$,the vapour pressure (in torr) of a solution of methyl alcohol $(A)$ and ethyl alcohol $(B)$ is represented by: $P_s = 120 X_A + 138$,where $X_A$ is the mole fraction of methyl alcohol. The values of $\lim_{X_A \to 0} (P_B^0)$ and $\lim_{X_B \to 0} (P_A^0)$ are:

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