EASY
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Statement - 1: Van't Hoff factor is equal to unity if the electrolytic solute undergoes 100 % dissociation. Because

Statement - 2: Van't Hoff factor for sucrose solution is unity.

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Important Questions on Solutions

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Chemistry>Physical Chemistry>Solutions>Colligative Properties
Water +CH3OH mixture shows positive deviation from ideal solution behaviour 100 mL of water is mixed with 100 mL  of CH3OH. Then, total volume of the mixture will be
HARD
Chemistry>Physical Chemistry>Solutions>Colligative Properties
Mixture(s) showing positive deviation from Raoult's law at 35oC is (are)
HARD
Chemistry>Physical Chemistry>Solutions>Colligative Properties

Benzene and toluene form an ideal solution over the entire range of composition. The vapour pressure of pure benzene and toluene at T K are 50 mmHg and 40 mmHg, respectively. What is the mole fraction of toluene in vapour phase when 117 g of benzene is mixed with 46 g of toluene?

(Molar mass of benzene and toluene are 78 and 92 g mol-1, respectively)

MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
The solution which will freeze at the lowest temperature is
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
Solution A contains acetone dissolved in chloroform and solution B contains acetone dissolved in carbon disulphide. The type of deviations from Raoult’s law shown by solutions A and B, respectively are
EASY
Chemistry>Physical Chemistry>Solutions>Colligative Properties
A mixture of toluene and benzene forms a nearly ideal solution. Assume PB° and PT° to be the vapor pressures of pure benzene and toluene, respectively. The slope of the line obtained by plotting the total vapor pressure to the mole fraction of benzene is:
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
A solution contains 5 moles of X and 5 moles of Y, and has a normal boiling point of 90°C. The vapor pressure of pure X is 300 mm Hg. What is the vapor pressure of pure Y at this temperature?
EASY
Chemistry>Physical Chemistry>Solutions>Colligative Properties
The vapour pressure of pure liquids A and B are 450 and 700 mm of Hg at 350 K respectively. If the total vapour pressure of the mixture is 600 mm of Hg, the composition of the mixture in the solution is
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Chemistry>Physical Chemistry>Solutions>Colligative Properties
The mixture which shows positive deviation from Raoult’s law is
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Chemistry>Physical Chemistry>Solutions>Colligative Properties
Which of the following mixtures shows negative deviation from Raoult's law?
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Chemistry>Physical Chemistry>Solutions>Colligative Properties
The colligative properties of a dilute solution depend upon
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
The mixture that forms maximum boiling azeotrope is
EASY
Chemistry>Physical Chemistry>Solutions>Colligative Properties
On mixing 20 mL of acetone with 60 mL of chloroform, the total volume of the solution is
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Chemistry>Physical Chemistry>Solutions>Colligative Properties
A pressure cooker reduces cooking time for food because
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
Which of the following conditions is satisfied by a non-ideal solution?
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Chemistry>Physical Chemistry>Solutions>Colligative Properties

The correct option for the value of vapour pressure of a solution at 45ºC with benzene to octane in molar ratio 3 : 2 is:

[At 45°C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

HARD
Chemistry>Physical Chemistry>Solutions>Colligative Properties
At 298 K, the vapour pressure of an ideal solution containing 1 mol of liquid L1 and 2 mol of liquid L2 is 500 mm Hg. When 2 mol of L1 is added to this solution, the vapour pressure of the solution increases by 5%. What are the respective vapour pressures (in mm Hg ) of L1 and L2 in their pure states at 298 K ?
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
Which of the following changes will cause increase in vapour pressure of 1 molal aqueous KI solution at same temperature?
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Chemistry>Physical Chemistry>Solutions>Colligative Properties
The vapour pressures of pure liquids A and Bare 400 and 600 mm Hg respectively at 298 K. On mixing the two liquids, the sum of their volumes is equal to the volume of the final mixture. The mole fraction of liquid B is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components A and B in the vapour phase, respectively are 
MEDIUM
Chemistry>Physical Chemistry>Solutions>Colligative Properties
For an ideal solution, the correct option is: