MEDIUM

Earn 100

What type of deviation (positive or negative) from ideal behaviour will be shown by the solution of cyclohexane and ethanol ? Give suitable reason.

Important Questions on Solutions

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?

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 of the following changes will cause increase in vapour pressure of

1

molal aqueous

KI

solution at same temperature?

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

A pressure cooker reduces cooking time for food because

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

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

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

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

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

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______?

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

A mixture of toluene and benzene forms a nearly ideal solution. Assume

P_{B} °

and

P_{T} °

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

For an ideal solution, the correct option is:

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The solution which will freeze at the lowest temperature is

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?