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Which of the following changes will cause increase in vapour pressure of $1$ molal aqueous $KI$ solution at same temperature?

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Important Questions on Solutions

EASY

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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______?

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

Consider the following liquid - vapour equilibrium.

L i q u i d ⇌ V a p o u r

Which of the following relations is correct?

HARD

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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?

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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>Vapour Pressure of Liquid Solutions

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:

HARD

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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

35^{o} C

is (are)

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

For an ideal solution, the correct option is:

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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>Vapour Pressure of Liquid Solutions

The vapour pressures of

A

and

B

25 ° C

are

90 mmHg

and

15 mm Hg

respectively. If

A

and

B

are mixed such that the mole fraction of

A

in the mixture is

0.6,

then the mole fraction of

B

in the vapour phase is

x \times 10^{- 1} .

The value of

x

is (Nearest integer)

HARD

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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)

HARD

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

Choose the correct statement with respect to the vapour pressure of a liquid among the following :

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

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

EASY

Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

The colligative properties of a dilute solution depend upon

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

The solution which will freeze at the lowest temperature is

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

The mixture that forms maximum boiling azeotrope is

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

A solution is prepared by mixing

40 g

{CHCl}_{3}

with

17 g

{CH}_{2} {Cl}_{2}

298 K

and

281 mmHg

pressure. Assuming validity of Roult's law, the vapour pressure of pure

{CH}_{2} {Cl}_{2}

(in

mmHg

) at

298 K

is [Vapour pressure of pure

{CHCl}_{3}

298 K = 200 mmHg

; molar mass of

{CHCl}_{3} = 120 g {mol}^{- 1}

; molar mass of

{CH}_{2} {Cl}_{2} = 85 g {mol}^{- 1}

]

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Chemistry>Physical Chemistry>Solutions>Vapour Pressure of Liquid Solutions

A pressure cooker reduces cooking time for food because

Which of the following changes will cause increase in vapour pressure of 1 molal aqueous KI solution at same temperature?

Important Questions on Solutions

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Which of the following changes will cause increase in vapour pressure of $1$ molal aqueous $KI$ solution at same temperature?