Which one of the following statements is fals | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Vedclass · Accepted Answer

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

Vedclass · Answer

(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.

List-$I$	List-$II$
$A$. van't Hoff factor,$i$	$I$. Cryoscopic constant
$B$. $k_{f}$	$II$. Isotonic solutions
$C$. Solutions with same osmotic pressure	$III$. $\frac{\text{Normal molar mass}}{\text{Abnormal molar mass}}$
$D$. Azeotropes	$IV$. Solutions with same composition of vapour above it

Which one of the following statements is false?

Similar Questions

If ethanol dissolves in water,then which of the following would be done?

Elevation in boiling point for $1.5 \, m$ solution of glucose in water is $4 \, K$. The depression in freezing point for $4.5 \, m$ solution of glucose in water is $4 \, K$. The ratio of molal elevation constant to molal depression constant $(K_{b} / K_{f})$ is $....$

The osmotic pressure of a solution is directly proportional to

Vedclass Test Series

Exam Paper Generator

Online Exam Module