MEDIUM

Earn 100

Consider the following statements.
(i) On adding Methyl alcohol to water, boiling point of water increases.
(ii) When $NaCl$ is added to water, depression in freezing point is observed.
(iii) Diffusion of solvent occurs from a region of its higher concentration to a region of its lower concentration.
Identify the correct options.

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Important Questions on Solutions

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The vapour pressure of a solution of glucose is

720 mmHg

100^{o} C

. What is the mole fraction of water in this solution?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Relative lowering of vapour pressure of a dilute solution of glucose dissolved in

1 kg

of water is

0.002

. The molality of the solution is

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

8 g

of a non-electrolyte solute is dissolved in

114 g

n -

octane to reduce its vapour pressure to

80 %,

the molar mass (in

g {mol}^{- 1}

) of the solute is [Given that molar mass of n-octane is

114 g {mol}^{- 1}

]

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

vapour pressure of water at

293 K

17535 mm Hg .

The vapour pressure of water at

293 K

containing

25 g

of glucose dissolved in

450 g

of water is

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

In 108 g of water, 18 g of a non-volatile compound is dissolved. At

100^{o} C

the vapor pressure of the solution is 750 mm Hg. Assuming that the compound does not undergo association or dissociation, the molar mass of the compound in

g m o l^{- 1}

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Benzene and toluene form nearly ideal solution. At

20 ° C

, the vapour pressure of benzene is

75 torr

and that of toluene is

22 torr

. The partial vapour pressure of benzene at

20 ° C

for a solution containing

78 g

of benzene and

46 g

of toluene (in

torr

) is

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

A set of solutions is prepared using

180 g

of water as a solvent and

10 g

of different non-volatile solutes

A, B

and

C

. The relative lowering of vapour pressure in the presence of these solutes are in the order [Given, molar mass of

A = 100 g {mol}^{- 1}; B = 200 g {mol}^{- 1}; C = 10, 000 g {mol}^{- 1}

]

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

When salt is added to water, which of the following statement is true?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

18 g

glucose

(C_{6} H_{12} O_{6})

is added to

178.2 g

water. The vapour pressure of water (in torr) for this aqueous solution is:

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

At room temperature, a dilute solution of urea is prepared by dissolving

0.60 g

of urea in

360 g

of water. If the vapour pressure of pure water at this temperature is

35 m m H g

, lowering of vapour pressure will be:
(molar mass of urea

= 60 g m o l^{- 1}

)

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The solution which will freeze at the lowest temperature is

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The vapour pressure of acetone at

20^{o} C

185 torr

. When

1.2 g

of a non-volatile substance was dissolved in

100 g

of acetone at

20^{o} C

, its vapour pressure was

183 torr

. The molar mass

(g m o l^{- 1})

of the substance is:

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The colligative properties of a dilute solution depend upon

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Which of the following statement is true?

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

A solution of urea (molar mass

60 g {mol}^{- 1}

) boils at

100.20 ° C

at the atmospheric pressure. if

K_{f}

and

K_{b}

for water are

1.86

and

0.512 {KKgmol}^{- 1}

respectively. The freezing point of the solution will be

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Colligative properties are those properties which depend on

MEDIUM

Chemistry>Physical Chemistry>Solutions>Colligative Properties

3 ml

of solution was made by dissolving

20 mg

of protein at

0 ° C .

The osmotic pressure of the resulting solution is

3.8

torr. The molecular weight of the protein is approximately (in

g / mol

)

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are together sealed in a container. Over time:

EASY

Chemistry>Physical Chemistry>Solutions>Colligative Properties

The mass of a non-volatile, non-electrolyte solute (molar mass

= 50 g {mol}^{- 1}

) needed to be dissolved in

114 g

octane to reduce its vapour pressure by

75 %

, is:

HARD

Chemistry>Physical Chemistry>Solutions>Colligative Properties

100^{o} C

the vapour pressure of a solution of 6.5 g of a non-volatile solute in 100 g water is 732 mm. If

K_{b} = 0.52

, the boiling point of this solution will be:

Important Questions on Solutions

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