Which of the following is not a colligative property?

• Elevation in boiling point

• Lowering of vapour pressure

• Osmotic pressure

• Freezing point

34.2 g of cane sugar is dissolved in 180 g of water. The relative lowering of vapour pressure will be

• 0.0099

• 1.1597

• 0.840

• 0.9901

According to Hess's law, the heat of reaction depends upon

• initial condition of reactants

• initial and final conditions of reactants

• intermediate path of the reaction

• end conditions of reactants

Ratio of loss in solvent to gain in CaCl₂ tube is

• $\frac{\mathrm{p}°}{\mathrm{p}}$

• $\frac{\mathrm{p}}{\mathrm{p}°}$

• $\frac{\mathrm{p}° - \mathrm{p}}{\mathrm{p}°}$

• $\frac{\mathrm{p} - \mathrm{p}°}{\mathrm{p}}$

Dissolution of 1.5 g of a non-volatile solute (mol. wt. = 60) in 250 g of a solvent reduces its freezing point by 0.01 °C. Find the molal depression constant of the solvent.

• 0.01

• 0.001

• 0.0001

• 0.1

Which of the following dissolves in ionic solvents?

• C₆H₆

• CH₃OH

• CCl₄

• C₅H₁₂

If M, W and V represent molar mass of solute, then mass of solute and volume of solution in litres respectively, which among following equations is true?

• $\mathrm{\pi } = \frac{\mathrm{MWR}}{\mathrm{TV}}$

• $\mathrm{\pi } = \frac{\mathrm{TMR}}{\mathrm{WV}}$

• $\mathrm{\pi } = \frac{\mathrm{TWR}}{\mathrm{VM}}$

• $\mathrm{\pi } = \frac{\mathrm{TRV}}{\mathrm{WM}}$

68.

Which of the following compounds has highest boiling point?

• Propan-1-ol

• n-butane

• Chloroethane

• Propanal

van't Hoff factor of centimolal solution of K₃[Fe(CN)₆] is 3.333. Calculate the per cent dissociation of K₃[Fe(CN)₆].

• 33.33

• 0.78

• 78

• 23.33

The osmotic pressure of solution containing 34.2 g of cane sugar (molar mass = 342 g mol^-1) in 1 L of solution at 20°C is (Given R = 0.082 L atm K^-1 mol^-1)

• 2.40 atm

• 3.6 atm

• 24 atm

• 0.0024 atm