Determining the normality of a solution with a density of 0.6 g/ml and composed of 35% NH4OH by mass.

1. 4.8 N

2. 10 N

3. 0.5 N

4. 6 N

Subtopic:  Concentration Terms & Henry's Law |
 56%
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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

Subtopic:  Relative Lowering of Vapour Pressure |
 72%
From NCERT
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Total vapour pressure of a mixture of 1 mol A (pA°  = 150 torr) and 2 mol B (pB° = 240 torr) is 200 torr. In this case:-

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 these 

Subtopic:  Introduction & Colligative properties | Relative Lowering of Vapour Pressure |
 64%
From NCERT
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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%
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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%
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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%
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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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