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

Aluminium phosphate is 100 % ionized in 0.01 m aqueous solution. Hence, $∆{\mathrm{T}}_{\mathrm{b}}/{\mathrm{k}}_{\mathrm{b}}$ is-

The relative lowering of vapour caused by dissolving 71.3 g of a substance in 1000 g of water is 7.13 x 10^-3. The molecular mass of the substance is-

1. 180 g mol^-1

2. 18 g mol^-1

3. 1.8 g mol^-1

4. 360 g mol^-1

1. There is a positive deviation from Raoult's law
2. There is a negative deviation from Raoult's law
3. There is no deviation from Raoult's law
4. None of the above.

If the partial pressure of oxygen is 0.5 atm and K_H = 1.4 × 10^-3 M/atm, then the amount of oxygen dissolved in 100 ml of water at 298 K is:

The van't Hoff factor of a 0.005 M aqueous solution of KCl is 1.95. The degree of ionisation of KCl is-

1. 0.95

2. 0.97

3. 0.94

4. 0.96

Compound PdCl₄.6H₂O is a hydrated complex, 1 molal aqueous solution of it has freezing point 269.28 K. Assuming 100 % ionization of complex, the molecular formula of the complex is-

(K_f for water = 1.86 K kg mole^-1)

1. [Pd(H₂O)₆]Cl₄

2. [Pd(H₂O)₄Cl₂]Cl₂.2H₂O

3. [Pd(H₂O)₃Cl₃]Cl.3H₂O

4. [Pd(H₂O)Cl₄]4H₂O

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.

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'

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