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

The vant Hoffs factor 'i' accounts for

• extend of solubility

• extent of mobility of solute

• extent of dissolution of solute

• extent of dissociation of solute

When the pure solvent diffuses out of the solution through the semi-permeable membrane then the process is called

• sorption

• dialysis

• reverse osmosis

• osmosis

167.

Which has the minimum freezing point ?

• One molal NaCl aq. solution

• One molal CaCl₂ aq. solution

• One molal KCl aq. solution

• One molal urea aq. solution

Which of the following aqueous solution has highest freezing point?

• 0.1 molal Al₂(SO₄)₃

• 0.1 molal BaCl₂

• 0.1 molal AlCl₃

• 0.1 molal NH₄Cl

If a solution containing 0.072 g atom of sulphur in 100 g of a solvent (k_f = 7.0) gave a freezing point depression of 0.84°C, the molecular formula of sulphur in the solutions is :

• S₆

• S₇

• S₈

• S₉

Which one of the following is not correct for an ideal solution ?

• It must obey Raoult's law

• $∆\mathrm{H} = 0$

• $∆\mathrm{C} = 0$

• $∆\mathrm{H} = ∆\mathrm{V} \ne 0$