Which of the following aqueous solution should have the highest osmotic pressure?
(1) 0.011 M AICI₃ at 50°C
(2) 0.03 M NaCI at 25°C
(3) 0.012 M (NH₄)₂SO₄ at 25°C
(4) 0.03 M NaCI at 50°C

50 g of antifreeze (ethylene glycol) is added to 200g water. What amount of ice will separate out at -9.3°C. (K_f = 1.86 K Kg mol^-1) :-

(1) 42 mg

(2) 42 g

(3) 38.71 g

(4) 38.71 mg

40 g NaOH (i=2) is dissolved in 1L volatile solvent vapour pressure of this solution becomes equal to its solid phase at 300K. What is the freezing point of pure solvent?

(Density = 1g/mL) (K_f=1.8 k kg mol^-1)

1. 296.4 K

2. 303.6 K 

3. 297.5 K

4. 302.4 K

P₁ and P₂ are vapour pressure of solvent and solution at temperature T. The solution is prepared by dissolving non-volatile solute in the same solvent. P₁ =760 torr, P₂ =684 mm Hg, Mole fraction of solvent in the solution will be:-

1. 0.1

2. 0.2

3. 0.9

4. Can't be predicted

100 g solute is dissolved in 1400 g of solvent. Density of resultant solution is 1.5 g/mL. The ratio of its molarity and molality will be :-
(1) 1.5

(2) 1.3

(3) 1.4

(4) 1.2
 

As scuba divers ascend towards the surface of the water from underwater, the solubility of gases in their blood:
1. Increases
2. Decreases
3. First increases and then decreases
4. First decreases and then Increases

Solution A & B are formed by dissolving a certain amount of glucose and sucrose in water. The Vapour pressure of these solutions is 660 and 560 mm Hg respectively at 100^oC. The ratio of molality of solutions A & B will be:-

$1. \frac{14}{33}$
$2. \frac{33}{14}$
$3. \frac{15}{35}$
$4. \frac{35}{15}$

Saturated solution of Ag₂SO₄ shows 0.003K rise in boiling point, K_sp will be :(K_b = 5 K kg mol^-1)(1m=1M)

1. 3.2 x 10^-11

2.  3.2 x 10^-10

3.  3.2 x 10^-9

4.  3.2 x 10^-12

When 36 g of a solute having the empirical formula CH₂O is dissolved in 1.2 kg of water, the solution freezes at -0.93°C. What is the molecular formula of solute (K_f = 1.86 kg K mol^-1)

(1) C₂H₄O
(2) C₂H₂O₂
(3) C₂H₄O₃
(4) C₂H₄O₂

6g urea is dissolved in 1kg solvent. Value of (T₁-T₂) will be : (K_f=2 kg K mol^-1)

1. 0.2°C
2. -0.2°C
3. 0.1°C
4. -0.1 K