Which one of the following statements is false?

  • A
    Raoult's law for a mixture of two liquids states that the vapour pressure of a component over a solution is proportional to its mole fraction.
  • B
    The osmotic pressure $(\pi)$ of a solution is given by the equation $\pi = iCRT$,where $C$ is the molarity of the solution.
  • C
    The correct order of osmotic pressure for $0.02 \ M$ aqueous solution of each compound is $SrCl_2 > NaCl > HCOOH > Sucrose$.
  • D
    Two sucrose solutions of the same molality prepared in different solvents will have the same freezing point depression.

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Similar Questions

$A$ substance '$X$' $(1.5 \ g)$ dissolved in $150 \ g$ of a solvent '$Y$' (molar mass $= 300 \ g \ mol^{-1}$) led to an elevation of the boiling point by $0.5 \ K$. The relative lowering in the vapour pressure of the solvent '$Y$' is . . . . . . $\times 10^{-2}$. (Nearest integer)
[Given : $K_{b}$ of the solvent $= 5.0 \ K \ kg \ mol^{-1}$]
Assume the solution to be dilute and no association or dissociation of $X$ takes place in solution.

What is boiling point? What is freezing point?

An aqueous solution of a non-electrolyte boils at $100.52 \, ^\circ C$. The freezing point of the solution will be ............ $^\circ C$.

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 specific heat of a certain substance is $0.86 \,J \,g^{-1} \,K^{-1}$. Assuming ideal solution behaviour,the energy required (in $J$) to heat $10 \,g$ of $1 \,molal$ of its aqueous solution from $300 \,K$ to $310 \,K$ is closest to $.... \,J$
[Given: Molar mass of the substance $= 58 \,g \,mol^{-1}$; specific heat of water $= 4.2 \,J \,g^{-1} \,K^{-1}$]

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