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.
Test Helpful For:	Chemistry Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Chemistry Interview Question Answer

Chemistry Solutions Practice Test Online With Explanation

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Page 1 of 3

Chemistry

1. The molal depression constant depends upon

Vapour pressure of solution

Nature of solvent

∆H solution

Nature of solute

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

Water – nitric acid

Water – hydrochloric acid

Acetone – chloroform

Benzene – methanol

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

Pressure of the atmosphere

Molecular weight of the solvent

The mole fraction of Solute

More fraction of solvent

4. Which inorganic precipitate acts as semipermeable membrane?

Nickel phosphate

Barium oxalate

Calcium sulphate

Copper ferrocyanide

5. Units of molarity are

Gm/lit

None

Kg/lit

Mol/lit

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

% v/w

% w/w

% w/v

% v/v

7. Maximum F.P falls in

Naphthalene

Water

Camphor

Benzene

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

None of these

Slightly more than the total volume of the components

Equal to the total volume of the components

Slightly less than the total volume of the components

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

Ion

Compound

Solution

Radical

10. In partially miscible liquids the two layers are

Unsaturated solution of each other

Saturated solution of each other

Normal solution of each other

No layer formation takes place

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

Mole fraction

Formality

Molarity

Molality

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

Reducing specific heat

Reducing viscosity

Lowering in b.pt.

Lowering in freezing pt

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

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

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

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

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

14. Isotonic solutions have same

Molar concentration

None of these

Normality

Molality

15. Saturated solution of NaCl on heating becomes

None

Unsaturated

Remains saturated

Super saturated

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

Fog

Dust particles in smoke

Paints

Opals

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

Density

Osmotic pressure

Depression of freezing point

Elevation of boiling point

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

It is saturated

It shows negative deviation from Rault’s law

It is metastable

It show positive deviation from Rault’s law

19. Which of the following is a colligative property?

Osmotic pressure

Freezing point

Melting point

Sublimation temperature

20. The molal depression constant depends upon

Nature of solute

Nature of solvent

∆H

Vapour pressure of solution

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

Molarity

All

Mole fraction

Molality

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

Glucose

CaCl₂

KCl

Urea

23. The process of osmosis was first discovered by

Traube

Nollet

Dutrochet

Pfeffer

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

Freezing point

Elevation of boiling point

Lowering of vapour pressure

Osmatic pressure

25. 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 is non-ideal, showing – ve deviation from Raoult’s Law

The solution formed is an ideal solution

Page 2 of 3

26. The lowest vapour pressure is exerted by

Ethanol

Methanol

Water

Chloroform

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

Solvent

Solute

Solvation

Solution

28. Which is not a colligative property?

Depression of freezing point

Osmotic pressure

Elevation of boiling point

Lowering of vapour pressure

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

Elevation of polling point

Osmotic pressure

Freezing point

Lowering of vapour pressure

30. Depression in freezing point is directly to

Molality of solvent

Molarity of solvent

Molality of solution

Molarity of solution

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

Super saturated

Ideal

Amorphous

Azeotropic mixture

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

Supersaturated

None of these

Unsaturated

Saturated

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

-1.86°C

+1.86°C

+3.72°C

-3.72°C

34. 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

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

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

Change in temperature of solutions takes place

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

Normality

Mole fraction

Molality

Molarity

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

Dilute

Saturated solution

All of these

Concentrated

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

Solvent

Solute

Phase

Solution

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

Azeotropic solution

Non-ideal solution

Zeotropic solution

Ideal solution

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

Osmotic pressure

Modification of refractive index

Elevation of boiling point

Depression in freezing pint

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

Both b & c

Will be non-ideal solution

Will be an ideal solution

Will show deviations from Raoults law

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

Coordinate compounds

Double salts

Hydrates

Complexes

42. Which one will from an ideal solution?

CHCI₃ and CH₃COOCH₃

H₂O and HBr.

C₂H₅OH and H₂O

C₆H₆ and CCI₄

43. The concentration units independent of temperature would be

Mass-volume percent

Normality

Molality

Molarity

44. 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

45. Solution of Na2SO4 will be

Neutral

Basic

Acidic

More acidic

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

Non-electrolyte solute

Non-volatile solute

Dilute solution

All of these

47. Which has the minimum freezing point?

One molal KCl Solution

One Molal NaCl

One molal urea solution

One molal CaCI₂

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

Electrophoresis

Cataphoresis

Osmosis

Electrolysis

49. The liquid pair which is not completely miscible

Phenol and water

CH₃OH and water

Benzene and toluene

Alcohol and water

50. A solution of two components is called

Dilute solution

Original solution

Standard solution

Binary solution

Page 3 of 3

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

1.8 dm³

900 cmn³

1 dm³

200 cm³

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

C₆H₆ and CCI₄

C₂H₅OH and H₂O

H₂O and HBr.

CHCI₃ and CH₃ 100 CH₃

53. The osmotic pressure of solution increases if

Number of solute molecules are increased

Temperature is decreased

Volume is increased

Solution constant is increased

54. Osmotic pressure of a solution increases by

Increasing the number of molecules of the solute

Increasing the volume

None of these

Decreasing the temperature

55. Beckmann’s apparatus is used to measure

Temperature

B.P elevation

Depression in F.P

Pressure

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

Lowering in freezing point

Reducing viscosity

Lowering in B.P

Reducing specific heat

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

Solvent

Ion

Solute

Phase

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

Mole fraction of solute

Mole fraction of Solvent

Molarity

Molality

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

Dilute solution

Solute non-electrolyte

All

Volatile solute

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

Saturated solution

Dilute solution

Super saturated solution

Unsaturated solution

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).

1.20 eq

2.40 eq

3.60 eq

0.600 eq

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

1 Molar solution

None of these

1 mole solution

1 normal solution

63. 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

0.045 N

0.066 N

0.090 N

64. The solution which distils over with change in composition

Azeotropic solution

Zeotropic solution

Ideal solution

Non-ideal solution

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Malik TahirLast Updated: October 14, 2025

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