Solutions P, Q, R and S are respectively 0.1 M glucose, 0.05 M NaCl, 0.05 M BaCl₂ and 0.1 M AlCl₃.Which one of the following pairs is isotonic?

• P and Q

• Q and R

• P and S

• P and R

412.

 10g of glucose (π₁), 10g of urea(π₂)and 10g of sucrose (π₃)are dissolved in 250ml of water at 300K. Correct order of osmotic pressure of solutions is

• π₁> π₂> π₃

•  π₃ > π₁> π₂

• π₂> π₃ > π₁

• π₂>  π₁ > π₃

Vapour pressure of a solution at 100° C having 3.42 g of cane sugar in 180 g water is

• 759.2 mm

• 760 mm

• 740 mm

• 748.5 mm

1% (W/V) solutions of KCl is dissociated to the extent of 82%. The osmotic pressure at 300 K will be

• 3.2 atm

• 5.824 atm

• 4.0 atm

• 6.0 atm

Sodium chloride is an ionic compound where as hydrogen chloride gas is mainly covalent because

• electronegativity difference in the case of hydrogen is less than 2.1

• hydrogen chloride is a gas

• hydrogen is a non-metal

• sodium is reactive

The decomposition of dinitrogen tetroxide at 300 K and 1.0 atm pressure is 20%, At equilibrium, the partial pressure (in atm) of nitrogen peroxide is

• 0.2

• 0.67

• 0.33

• 0.8

Which of the following solutions will exhibit highest boiling point?

• 0.01M Na₂SO₄ (aq)

• 0.1M KNO₃ (aq)

• 0.015 M urea(aq)

• 0.015 M glucose(aq)

Osmotic pressure observed when benzoic add is dissolved in benzene is less than that expected from theoretical considerations. This is because:

• benzoic acid is an organic solute

• benzoic acid has higher molar mass than benzene

• benzoic acid gets assoicated in benzene

• benzoic acid gets dissociated in benzene

The mass of glucose that should be dissolved in 50 g of water in order to produce the same lowering of vapour pressure as is produced by dissolving 1 g of urea in the same quantity of water is:

• 1g

• 3g

• 6g

• 18g

Which of the following can be measured by the Ostwald-Walker dynamic method?

• Relative lowering of vapour pressure

• Lowering of vapour pressure

• Vapour pressure of the solvent

• All of the above