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

Subtopic:  Osmosis & Osmotic Pressure |
 55%
From NCERT
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50 g of antifreeze (ethylene glycol) is added to 200g water. What amount of ice will separate out at -9.3°C. (Kf = 1.86 K Kg mol-1) :-

(1) 42 mg

(2) 42 g

(3) 38.71 g

(4) 38.71 mg

Subtopic:  Depression of Freezing Point |
 64%
From NCERT
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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) (Kf=1.8 k kgmol-1)

1. 296.4 K

2. 303.6 K 

3. 297.5 K

4. 302.4 K

Subtopic:  Depression of Freezing Point |
 62%
From NCERT
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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

Subtopic:  Relative Lowering of Vapour Pressure |
 61%
From NCERT
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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

Subtopic:  Concentration Terms & Henry's Law |
 66%
From NCERT
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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

Subtopic:  Concentration Terms & Henry's Law |
 66%
From NCERT
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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 100oC. The ratio of molality of solutions A & B will be:-

1. 1433     
2. 3314
3. 1535
4. 3515

Subtopic:  Concentration Terms & Henry's Law |
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Saturated solution of Ag2SO4 shows 0.003K rise in boiling point, Ksp will be :(Kb = 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

Subtopic:  Elevation of Boiling Point |
 53%
From NCERT
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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= 1.86 kg K mol-1)

(1) C2H4O

(2) C2H2O2
(3) C2H4O3

(4) C2H4O2

Subtopic:  Depression of Freezing Point |
 76%
From NCERT
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6g urea is dissolved in 1kg solvent. Value of (T1-T2) will be : (Kf=2 kg K mol-1)

1. 0.2°C
2. -0.2°C
3. 0.1°C
4. -0.1 K

Subtopic:  Depression of Freezing Point |
 63%
From NCERT
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