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Chemistry Solutions Online Mcqs Test

Malik TahirLast Updated: October 14, 2025

Important Chemistry Solutions Question and Answer

Total Questions:	64
Time Allowed:	30 Minutes
Total Marks:	64
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Chemistry Solutions Practice Test Online With Explanation

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Page 1 of 3

Chemistry

1. The lowest vapour pressure is exerted by

Ethanol

Chloroform

Methanol

Water

2. Which of the following are the conditions of colligative properties?

Dilute solution

Non-electrolyte solute

Non-volatile solute

All of these

3. Which of the following is not a colligative property?

Depression of freezing point

Elevation of boiling point

Osmotic pressure

Density

4. If the volume of solution is equal to sum of volumes of its all components then the solution

Will be an ideal solution

Will show deviations from Raoults law

Both b & c

Will be non-ideal solution

5. Which of the following will form an ideal solution?

C₆H₆ and CCI₄

C₂H₅OH and H₂O

CHCI₃ and CH₃ 100 CH₃

H₂O and HBr.

6. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% w/v

% v/w

% v/v

% w/w

7. In cold countries ethylene glycol is added to water in radiators of cars during winter, It results in

Reducing specific heat

Lowering in freezing point

Lowering in B.P

Reducing viscosity

8. The concentration units independent of temperature would be

Mass-volume percent

Normality

Molarity

Molality

9. The solution which does not boil at a particular temperature

Azeotropic solution

Zeotropic solution

Non-ideal solution

Ideal solution

10. In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

Reducing specific heat

Lowering in b.pt.

Reducing viscosity

Lowering in freezing pt

11. In azeotropic mixture showing positive deviation from Rault’s law, the volume of the mixture is

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

Slightly more than the total volume of the components

12. Maximum F.P falls in

Naphthalene

Water

Benzene

Camphor

13. A solution of glucose is 10%. The volume in which 1 g mole of it is dissolved will be

900 cmn³

200 cm³

1.8 dm³

1 dm³

14. The compounds in which water molecules are added are called

Double salts

Complexes

Coordinate compounds

Hydrates

15. What happens when isotonic solution of A (mol. Wt. 342) and B (mol. wt 60) are put in to communication through semipermeable membrane?

Transference of solvent from solution A to that of B take place

Change in temperature of solutions takes place

Transference of solvent from solution B to that of A takes place

No transference of solvent from solution A to that of B takes place

16. If ionic product of solution is greater than solubility products, the solution is

Supersaturated

Saturated

Unsaturated

None of these

17. Solution which distill without change in composition or temperature are called

Ideal

Azeotropic mixture

Super saturated

Amorphous

18. The molal depression constant depends upon

Nature of solute

∆H

Vapour pressure of solution

Nature of solvent

19. Which one will from an ideal solution?

C₆H₆ and CCI₄

H₂O and HBr.

C₂H₅OH and H₂O

CHCI₃ and CH₃COOCH₃

20. The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

-3.72°C

+3.72°C

-1.86°C

+1.86°C

21. Which of the following is a colligative property?

Melting point

Sublimation temperature

Osmotic pressure

Freezing point

22. The liquid pair which is not completely miscible

CH₃OH and water

Phenol and water

Benzene and toluene

Alcohol and water

23. Which is not a colligative property?

Elevation of boiling point

Lowering of vapour pressure

Depression of freezing point

Osmotic pressure

24. Which of the following is not a colligative property?

Osmotic pressure

Depression in freezing pint

Modification of refractive index

Elevation of boiling point

25. A solution of two components is called

Dilute solution

Original solution

Binary solution

Standard solution

Page 2 of 3

26. A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statement is correct regarding the behavior of the solution?

n-heptane shows +ve deviation while ethanol shows – ve deviation from Raoult’s Law

The solution is non-ideal, showing +ve deviation from Raoult’s Law

The solution formed is an ideal solution

The solution is non-ideal, showing – ve deviation from Raoult’s Law

27. Homogeneous mixture of two or more than two compounds is called

Solution

Compound

Radical

Ion

28. The molal depression constant depends upon

∆H solution

Vapour pressure of solution

Nature of solvent

Nature of solute

29. The solution which distils over with change in composition

Non-ideal solution

Zeotropic solution

Ideal solution

Azeotropic solution

30. The vapour pressure of a liquid in a closed container depends upon

Temperature

Amount of liquid

Nature of non ovolatile

Surface area of the container

31. Which of the following solutions of H₂SO₄ is more concentrated?

1 Molar solution

1 mole solution

1 normal solution

None of these

32. Units of molarity are

None

Gm/lit

Kg/lit

Mol/lit

33. The process of osmosis was first discovered by

Nollet

Traube

Dutrochet

Pfeffer

34. For dilute solution, Raoult’s law states that:

The relative lowering of vapour pressure is proportional to amount of solute

The vapor pressure of the solution is equal to mole fraction of the solvent

The relative lowering of vapour pressure is equal to mole fraction of solute

The lowering of vapor pressure is equal to the mole fraction of solute in solution

35. Which inorganic precipitate acts as semipermeable membrane?

Nickel phosphate

Calcium sulphate

Barium oxalate

Copper ferrocyanide

36. Azeotropic mixture of two liquids boil at a lower temperature than either of them, when

It is saturated

It is metastable

It shows negative deviation from Rault’s law

It show positive deviation from Rault’s law

37. Beckmann’s apparatus is used to measure

B.P elevation

Temperature

Depression in F.P

Pressure

38. At 25°C, the highest osmotic pressure is exhibited by 0.1 M solution of

Urea

CaCl₂

Glucose

KCl

39. The relative lowering of vapour pressure is directly proportional to molality if the solution is

Concentrated

All of these

Saturated solution

Dilute

40. Which of the following unit of concentration is independent of temperature?

Molality

All

Mole fraction

Molarity

41. According to Raoult’s law, the relative lowering of vapour pressure is equal to

The mole fraction of Solute

More fraction of solvent

Molecular weight of the solvent

Pressure of the atmosphere

42. Every sample of matter with uniform properties and fixed composition is called

Solution

Phase

Solvent

Solute

43. Number of moles of solute dissolved in 1 kg of solvent is called

Molarity

Formality

Molality

Mole fraction

44. The movement of solvent molecules through a semipermeable membrane is called

Cataphoresis

Osmosis

Electrolysis

Electrophoresis

45. Osmotic pressure of a solution increases by

Increasing the volume

Increasing the number of molecules of the solute

None of these

Decreasing the temperature

46. A homogeneous mixture of two or more than two chemical substances is called

Solute

Solvation

Solvent

Solution

47. Which has the minimum freezing point?

One molal urea solution

One Molal NaCl

One molal KCl Solution

One molal CaCI₂

48. Solution of Na2SO4 will be

Basic

Neutral

Acidic

More acidic

49. The molal elevation constant is the ratio of the elevation in boiling point to

Mole fraction of solute

Molality

Molarity

Mole fraction of Solvent

50. Which of the following liquid pairs shows a positive deviation from Raoult’s law?

Benzene – methanol

Acetone – chloroform

Water – hydrochloric acid

Water – nitric acid

Page 3 of 3

51. Solution with maximum concentration of solute at given temperature is called

Saturated solution

Unsaturated solution

Dilute solution

Super saturated solution

52. Number of moles in 1 kg of solvent is called

Molarity

Normality

Mole fraction

Molality

53. Which of the following is not a colligative property?

Lowering of vapour pressure

Freezing point

Elevation of boiling point

Osmatic pressure

54. Which of the following are the conditions of colligative properties?

All

Volatile solute

Dilute solution

Solute non-electrolyte

55. Which of the following in not a colligative property?

Osmotic pressure

Lowering of vapour pressure

Elevation of polling point

Freezing point

56. Calculate the normality of a solution that contains 4.5 g of (COOH)₂ in 3000 mL of solution? (Assume the (COOH)₂ is to be completely neutralized in an acid-base reaction.)

0.033 N

0.066 N

0.045 N

0.090 N

57. In partially miscible liquids the two layers are

Unsaturated solution of each other

No layer formation takes place

Normal solution of each other

Saturated solution of each other

58. Saturated solution of NaCl on heating becomes

Super saturated

Unsaturated

Remains saturated

None

59. Depression in freezing point is directly to

Molarity of solvent

Molality of solution

Molality of solvent

Molarity of solution

60. Which of the following is an example of liquid solute and gas solvent?

Fog

Dust particles in smoke

Opals

Paints

61. How many equivalents of phosphoric acid are contained in 300 mL of 4.00 M phosphoric acid? (Assume the acid is to be completely neutralized by a base).

0.600 eq

1.20 eq

3.60 eq

2.40 eq

62. Isotonic solutions have same

None of these

Molar concentration

Normality

Molality

63. The osmotic pressure of solution increases if

Number of solute molecules are increased

Temperature is decreased

Solution constant is increased

Volume is increased

64. The component of solution which is in smaller amount is called

Ion

Phase

Solvent

Solute

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Malik TahirLast Updated: October 14, 2025

Chemistry Solutions Online Mcqs Test

Important Chemistry Solutions Question and Answer

Chemistry Solutions Practice Test Online With Explanation

Chemistry

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