Given that the pH of a 0.1 M monobasic acid is 2, what is the osmotic pressure at a given temperature T?

1. 0.1RT

2. 0.11RT

3. 1.1RT

4. 0.01RT

Which of the following 0.1 M aqueous solutions will have the lowest freezing point?

The vapour pressure of a pure liquid solvent A is 0.80 atm. When a non-volatile substance B is added to the solvent, its vapour pressure drops to 0.60 atm.
Mole fraction of the component B in the solution is:

The lowest boiling point, if concentration is fixed at 0.1 M in aqueous solution, is given by which of the following solutions?

a. K₂SO₄

b. NaCl

c. Urea

d. Glucose

1. a, b

2. b, c

3. c, d

4. d, a

A solution is prepared by dissolving 18 g of glucose in 1000 g of water. When this solution is cooled to –0.2 °C,
some ice separates. Calculate the amount of ice that separates from the solution.

[Freezing point depression constant of water, K_f(H₂O) = 1.86 K molal^-1]

An aqueous solution of hydrochloric acid -

1. Obeys Raoult's law

2. Shows negative deviations from Raoult's law

3. Shows positive deviations from Raoult's law

4. Obeys Henry's law at all compositions

The relationship between osmotic pressure at 273 K, when 10 gm glucose (P₁), 10 gm urea (P₂), and 10 gm sucrose (P₃) are dissolved in 250 ml of water, is-

1. P₁ > P₂ > P₃

2. P₃ > P₁ > P₂

3. P₂ > P₁ > P₃

4. P₂ > P₃ > P₁

Two aqueous NaCl solutions are separated by a semipermeable membrane. Solution A contains 2% NaCl, while solution B contains 10% NaCl. Predict the direction of movement of water through the membrane.

1. NaCl will flow from 'A' to 'B'

2. NaCl will flow from 'B' to 'A'

3. Water will flow from 'A' to 'B'

4. Water will flow from 'B' to 'A'

Calculate the number of moles of K₂SO₄ that must be dissolved in 12 moles of water to lower its vapour pressure by 10 mm Hg. The vapour pressure of pure water at the same temperature is 50 mm Hg.
Assume complete dissociation of K₂SO₄.

The salt that possesses the highest freezing point

1. 0.01 M NaCl

2. 0.05 M Urea

3. 0.01 M MgCl₂

4. 0.02 M NaCl