Osmotic pressure of 40% (w/V) urea solution is 1.64 atm. and that of 3.42% (w/V) cane sugar solution is 2.46 atm. When equal volumes of the above two solutions are mixed, the osmotic pressure of the resulting solution will be?  

(1) 1.64 atm

(2) 2.46 atm

(3) 4.10 atm

(4) 2.05 atm 

Subtopic:  Osmosis & Osmotic Pressure |
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20g of naphthoic acid (C11H8O2) dissolved in 50g of benzene (Kf=1.72 K Kg mol-1) shows a depression in freezing point of 2K. The Vant Hoff factor is?

1. 0.5

2. 0.1

3. 2

4. 3

Subtopic:  Van’t Hoff Factor |
 76%
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A 0.002 molar solution of NaCl having degree of dissociation of 90% at 270C, has osmotic pressure equal to:-

1. 0.94 bar

2. 9.4 bar

3. 0.094 bar

4. 9.4 x 10-4 bar

Subtopic:  Osmosis & Osmotic Pressure |
 58%
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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%
From NCERT
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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%
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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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