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If liquids A and B form an ideal solution, the

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Important Questions on Solutions

EASY

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

MEDIUM

Chemistry>Physical Chemistry>Solutions>Raoult's Law

For an ideal solution, the correct option is:

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Chemistry>Physical Chemistry>Solutions>Raoult's Law

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>Raoult's Law

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>Raoult's Law

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:

MEDIUM

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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>Raoult's Law

The mixture that forms maximum boiling azeotrope is

EASY

Chemistry>Physical Chemistry>Solutions>Raoult's Law

A pressure cooker reduces cooking time for food because

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Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

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Chemistry>Physical Chemistry>Solutions>Raoult's Law

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?

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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)

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

The plot of total vapour pressure as a function of mole fraction of the components of an ideal solution formed by mixing liquids

X

and

Y

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Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

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Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

Liquids A and B form ideal solution over the entire range of composition. At temperature

T

, equimolar binary solution of liquids A and B has vapour pressure

45 T o r r

. At the same temperature, a new solution of A and B having mole fractions

x_{A} and x_{B}

, respectively, has vapour pressure of

22.5 T o r r

. The value of

\frac{x_{A}}{x_{B}}

, in the new solution is ____.

(Given that the vapour pressure of pure liquid A is

20 Torr

at temperature

T

)

MEDIUM

Chemistry>Physical Chemistry>Solutions>Raoult's Law

Vapour pressure of water at

293 K

17.535 mm Hg

. Calculate the vapour pressure of water at

293 K

when

25 g

of glucose is dissolved in

450 g

of water.

MEDIUM

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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:

HARD

Chemistry>Physical Chemistry>Solutions>Raoult's Law

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

35^{o} C

is (are)

If liquids A and B form an ideal solution, the

Important Questions on Solutions

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