Class 12 Chemistry - Chapter 2: Solutions MCQ Questions

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Question 1

A beaker contains a solution of substance â€˜Aâ€™. Precipitation of substance â€˜Aâ€™ takes place when small amount of â€˜Aâ€™ is added to the solution. The solution is ………………

A concentrated

B unsaturated

C supersaturated

D saturated

Question 2

An unripe mango placed in a concentrated salt solution to prepare pickle shrivels because ………..

A it loses water due to osmosis.

B it gains water due to reverse osmosis.

C it loses water due to reverse osmosis.

D it gains water due to osmosis.

Question 3

(a) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoultâ€™s law.

A negative deviation from Raoultâ€™s law.

B At specific composition, methanol- acetone mixture will form maximum boiling azeotrope and will show

C At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoultâ€™s law.

D At specific composition, methanol- acetone mixture forms maximum boiling azeotrope and will show positive deviation from Raoultâ€™s law.

Question 4

Arrange these gases in the order of their increasing solubility.

A Ar < CH₄ < CO₂ < HCHO

B Ar < CO₂ < CH₄ < HCHO

C HCHO < CO₂ < CH₄ < Ar

D HCHO < CH₄ < CO₂ < Ar

Question 5

4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is

A 0.016

B 0.012

C 0.008

D 0.004

Question 6

(C) In chloroform and acetone mixture, A-A or B-B type intermolecular interactions are weaker than A-B type interactions.

A Solution (C) will show positive deviation from Raoultâ€™s law.

B Solution (B) will show negative deviation from Raoultâ€™s law.

C Solution (A) will follow Raoultâ€™s law.

D Solutions (B) and (C) will follow Raoultâ€™s law.

Question 7

If two liquids A and B form minimum boiling azeotrope at some specific composition, then .

A A-B interactions are weaker than those between A-A or B-B.

B Vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution.

C Vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution.

D A-B interactions are stronger than those between A-A or B-B.

Question 8

On dissolving sugar in water at room temperature, solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

A Powdered sugar in hot water.

B Powdered sugar in cold water.

C Sugar crystals in hot water.

D Sugar crystals in cold water.

Question 9

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to

A both low temperature and high atmospheric pressure

B high atmospheric pressure

C low atmospheric pressure

D low temperature

Question 10

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon .

A nature of solvent

B pressure

C nature of solute

D temperature

Question 11

Colligative properties depend on

A the nature of solvent particles.

B the physical properties of the solute particles dissolved in solution.

C the number of solute particles in solution.

D the nature of the solute particles dissolved in solution.

Question 12

At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of NaCl solution?

A Vapour pressure in container (B) is twice the vapour pressure in container (A).

B Vapour pressure is equal in both the containers.

C Vapour pressure in container (A) is less than that in container (B).

D Vapour pressure in container (A) is more than that in container (B).

Question 13

At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ………….

A zero

B equal to the rate of crystallisation

C greater than the rate of crystallisation

D less than the rate of crystallisation

Question 14

We have three aqueous solutions of NaCl labelled as â€˜Aâ€™, â€˜Bâ€™ and â€˜Câ€™ with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of vanâ€™t Hoff factor for these solutions will be in the order

A i_A < i_B > i_C

B i_A = i_B = i_C

C i_A > i_B > i_C

D i_A < i_B < i_C

Question 15

Which of the following units is useful in relating concentration of solution with its vapour pressure?

A molality

B mass percentage

C parts per million

D mole fraction

Question 16

Which of the following aqueous solutions should have the highest boiling point?

A 1.0 M KNO₃

B 1.0 M NH₄NO₃

C 1.0 M Na₂SO₄

D (o) 1.0 M NaOH

Question 17

The unit of ebullioscopic constant is

A K mol kg^-1 or K (molality)

B kg mol^-1 K^-1 or K^-1 (molality)^-1

C mol kg K^-1 or K^-1 (molality)

D K kg mol^-1 or K (molality)^-1

Question 18

At a given temperature, osmotic pressure of a concentrated solution of a substance

A cannot be compared with osmotic pressure of dilute solution.

B is same as that of a dilute solution.

C is lower than that of a dilute solution.

D is higher than that of a dilute solution.

Question 19

The value of Henryâ€™s constant K_H is

A not related to the solubility of gases.

B constant for all gases.

C greater for gases with lower solubility.

D greater for gases with higher solubility.

Question 20

Which of the following statements is false?

A According to Raoultâ€™s law, the vapour pressure exerted by a volatile component of a solution is directly proportional to its mole fraction in the solution.

B Decreasing order of osmotic pressure for 0.01 M aqueous solutions of barium chloride, potassium chloride, acetic acid and sucrose is BaCl₂ > KCl > CH₃COOH > sucrose.

C The osmotic pressure of a solution is given by the equation Ï€ = cRT (where c is the molarity of the solution).

D Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.

Question 21

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoultâ€™s law?

A Phenol and aniline.

B Nitric acid and water.

C Chloroform and acetone.

D Methanol and acetone.

Question 22

Value of Henryâ€™s constant, K_H

A first increases then decreases.

B remains constant.

C decreases with increase in temperature.

D increases with increase in temperature.

Question 23

In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl₂ solution is ………..

A about six times

B about three times

C about twice

D the same

Question 24

The values of Vanâ€™t Hoff factors for KCl, NaCl and K₂SO₄, respectively, are

A 1, 1 and 1

B 1,1 and 2

C 2, 2 and 3

D 2, 2 and 2

Question 25

A Water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A).

B Water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B).

C Water will move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B).

D Water will move from side (A) to side (B) if a pressure lower than osmotic pressure is applied on piston (B).

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Class 12 Chemistry - Chapter 2: Solutions MCQ Questions

Your Class 12 Chemistry Study Path

A beaker contains a solution of substance â€˜Aâ€™. Precipitation of substance â€˜Aâ€™ takes place when small amount of â€˜Aâ€™ is added to the solution. The solution is ………………

An unripe mango placed in a concentrated salt solution to prepare pickle shrivels because ………..

(a) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoultâ€™s law.

Arrange these gases in the order of their increasing solubility.

4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is

(C) In chloroform and acetone mixture, A-A or B-B type intermolecular interactions are weaker than A-B type interactions.

If two liquids A and B form minimum boiling azeotrope at some specific composition, then .

On dissolving sugar in water at room temperature, solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon .

Colligative properties depend on

At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of NaCl solution?

At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ………….

We have three aqueous solutions of NaCl labelled as â€˜Aâ€™, â€˜Bâ€™ and â€˜Câ€™ with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of vanâ€™t Hoff factor for these solutions will be in the order

Which of the following units is useful in relating concentration of solution with its vapour pressure?

Which of the following aqueous solutions should have the highest boiling point?

The unit of ebullioscopic constant is

At a given temperature, osmotic pressure of a concentrated solution of a substance

The value of Henryâ€™s constant K_H is

Which of the following statements is false?

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoultâ€™s law?

Value of Henryâ€™s constant, K_H

In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl₂ solution is ………..

The values of Vanâ€™t Hoff factors for KCl, NaCl and K₂SO₄, respectively, are

Practice Complete!

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Class 12 Chemistry - Chapter 2: Solutions MCQ Questions

Your Class 12 Chemistry Study Path

A beaker contains a solution of substance â€˜Aâ€™. Precipitation of substance â€˜Aâ€™ takes place when small amount of â€˜Aâ€™ is added to the solution. The solution is ………………

An unripe mango placed in a concentrated salt solution to prepare pickle shrivels because ………..

(a) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoultâ€™s law.

Arrange these gases in the order of their increasing solubility.

4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is

(C) In chloroform and acetone mixture, A-A or B-B type intermolecular interactions are weaker than A-B type interactions.

If two liquids A and B form minimum boiling azeotrope at some specific composition, then .

On dissolving sugar in water at room temperature, solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon .

Colligative properties depend on

At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of NaCl solution?

At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ………….

We have three aqueous solutions of NaCl labelled as â€˜Aâ€™, â€˜Bâ€™ and â€˜Câ€™ with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of vanâ€™t Hoff factor for these solutions will be in the order

Which of the following units is useful in relating concentration of solution with its vapour pressure?

Which of the following aqueous solutions should have the highest boiling point?

The unit of ebullioscopic constant is

At a given temperature, osmotic pressure of a concentrated solution of a substance

The value of Henryâ€™s constant KH is

Which of the following statements is false?

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoultâ€™s law?

Value of Henryâ€™s constant, KH

In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2 solution is ………..

The values of Vanâ€™t Hoff factors for KCl, NaCl and K2SO4, respectively, are

Practice Complete!

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The value of Henryâ€™s constant K_H is

Value of Henryâ€™s constant, K_H

In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl₂ solution is ………..

The values of Vanâ€™t Hoff factors for KCl, NaCl and K₂SO₄, respectively, are