431.

Which of the following is not a colligative property?

• Elevation in boiling point

• Depression in freezing point

• Osmotic pressure

• Lowering of vapour pressure

3 g of urea is dissolved in 45 g of H₂O. The relative lowering in vapour pressure is

• 0.05

• 0.04

• 0.02

• 0.01

Which of the following aqueous solution will exhibit highest boiling point?

• 0.01M urea

• 0.01 M KNO₃

• 0.01M Na₂SO₄

• 0.015M C₆H₁₂O₆

Which of the following is not a colligative property?

• Osmotic pressure

• Optical activity

• Depression in freezing point

• Elevation in boiling point

Which of the following aqueous solution has the highest freezing point?

• 0.1M surcose

• 0.01 M NaCl

• 0.1 M NaCl

• 0.01 M Na₂SO₄

When an electrolyte is dissociated in solution, the van't Hoff factor (i) is

• > 1

• < 1

• = 0

• = 1

Osmotic pressure of the solution can be increased by,

• increasing the temperature of the solution

• decreasing the temperature of the solution

• increasing the volume of the vessel

• diluting the solution

After adding non-volatile solute freezing point of water decreases to -0.186C. Calculate ΔT_b if K_f = 1.86 K kg mol^-1 and K_b =0.521 K kg mol^-1.

• 0.521

• 0.0521

• 1.86

• 0.0186

Which of the following has the lowest freezing point?

• 0.1 m sucrose

• 0.1 m urea

• 0.1 m ethanol

• 0.1 m glucose

A litre of solution is saturated with AgCl. To this solution if 1.0 × 10^-4 mole of solid NaCl is added, what will be the [Ag⁺], assuming no volume change ?

• More

• Less

• Equal

• Zero