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Two liquids ' $A$ ' and $B$ '' form an ideal solution. At $300 K$ , the vapour pressure of a solution containing $1$ mol of $A$ and $3$ mol of $B$ is $550 mm Hg$ . At the same temperature if one more mole of $B$ is added to this solution, the vapour pressure of the solution increases by $10 mm Hg .$ Determine the vapour pressure of ' $A$ ' and ' $B$ ' in their pure states.

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Important Questions on Solutions

HARD

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Mixture(s) showing positive deviation from Raoult's law at

35^{o} C

is (are)

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

For an ideal solution, the correct option is:

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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

HARD

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Liquids

A

and

B

form ideal solution for all compositions of

A

and

B

25^{\circ} C

. Two such solutions with

0.25

and

0.50

mole fractions of

A

have the total vapor pressures of

0.3

and

0.4

bar, respectively. What is the vapor pressure of pure liquid

B

in bar?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Which one is not equal to zero for an ideal solution?

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The mixture which shows positive deviation from Raoult’s law is

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The mixture that forms maximum boiling azeotrope 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

300 mm Hg

. What is the vapor pressure of pure

Y

at this temperature?

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Which one of the following is incorrect for ideal solution?

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

For an ideal solution of two components

A & B

, which of the following is true?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Which of the following mixtures shows negative deviation from Raoult's law?

HARD

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Liquids

A

and

B

form an ideal solution in the entire composition range. At

350 K,

the vapour pressure of pure A and pure B are

7 \times 10^{3} Pa

and

12 \times 10^{3} Pa

, respectively. The composition of the vapour in equilibrium with a solution containing 40 mole percent of A at this temperature is:

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?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

300 K

, the vapour pressure of a solution containing

1

mole of

n

-hexane and

3

moles of

n

-heptane is

550 mm

Hg

. At the same temperature, if one more mole of

n

-heptane is added to this solution, the vapour pressure of the solution increases by

10 mm

Hg

. What is the vapour pressure in

mmHg

n

- heptane in its pure state______?

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)

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

A pressure cooker reduces cooking time for food because

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Water

+ {CH}_{3} OH

mixture shows positive deviation from ideal solution behaviour

100 mL

of water is mixed with

100 mL

{CH}_{3} OH

. Then, total volume of the mixture will be

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The vapour pressures of pure liquids

A

and

B

are

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

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

A solution at

20^{o} C

is composed of 1.5 mol of benzene and 3.5 mol of toluene. If the vapour pressure of pure benzene and pure toluene at this temperature are 74.7 torr and 22.3 torr respectively, then the total vapour pressure of the solution and the benzene mole fraction in equilibrium with it will be, respectively:

HARD

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at

25^{o} C

. (Given vapour pressure data at

25^{o} C

, benzene = 12.8 kPa, toluene = 3.85 kPa)

Important Questions on Solutions

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