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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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Chemistry

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

Will be an ideal solution

Will be non-ideal solution

Both b & c

Will show deviations from Raoults law

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

Paints

Fog

Opals

Dust particles in smoke

3. Solution of Na2SO4 will be

More acidic

Basic

Neutral

Acidic

4. Which is not a colligative property?

Lowering of vapour pressure

Elevation of boiling point

Depression of freezing point

Osmotic pressure

5. The solution which distils over with change in composition

Non-ideal solution

Azeotropic solution

Ideal solution

Zeotropic solution

6. A solution of two components is called

Original solution

Dilute solution

Standard solution

Binary solution

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

+3.72°C

-1.86°C

-3.72°C

+1.86°C

8. The molal depression constant depends upon

Vapour pressure of solution

∆H

Nature of solute

Nature of solvent

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

Water – nitric acid

Acetone – chloroform

Water – hydrochloric acid

Benzene – methanol

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

Lowering of vapour pressure

Freezing point

Elevation of boiling point

Osmatic pressure

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

None of these

Equal to the total volume of the components

Slightly less than the total volume of the components

Slightly more than the total volume of the components

12. In partially miscible liquids the two layers are

Unsaturated solution of each other

Saturated solution of each other

No layer formation takes place

Normal solution of each other

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

Super saturated solution

Dilute solution

Unsaturated solution

Saturated solution

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

Solute

Solvent

Solvation

Solution

15. The process of osmosis was first discovered by

Pfeffer

Nollet

Dutrochet

Traube

16. Saturated solution of NaCl on heating becomes

None

Remains saturated

Unsaturated

Super saturated

17. Which has the minimum freezing point?

One molal KCl Solution

One Molal NaCl

One molal CaCI₂

One molal urea solution

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

Lowering in freezing pt

Reducing viscosity

Reducing specific heat

Lowering in b.pt.

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

It shows negative deviation from Rault’s law

It show positive deviation from Rault’s law

It is saturated

It is metastable

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

Electrophoresis

Osmosis

Cataphoresis

Electrolysis

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

Temperature

Nature of non ovolatile

Surface area of the container

Amount of liquid

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

Solute non-electrolyte

Volatile solute

Dilute solution

All

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

1.8 dm³

1 dm³

900 cmn³

200 cm³

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

Phase

Solution

Solute

Solvent

25. The molal depression constant depends upon

Vapour pressure of solution

Nature of solvent

∆H solution

Nature of solute

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

Solvent

Ion

Phase

Solute

27. 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

28. The concentration units independent of temperature would be

Mass-volume percent

Molarity

Normality

Molality

29. Osmotic pressure of a solution increases by

None of these

Decreasing the temperature

Increasing the number of molecules of the solute

Increasing the volume

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

Glucose

Urea

KCl

CaCl₂

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

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

Change in temperature of solutions takes place

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

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

32. 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 freezing point

Lowering in B.P

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

Unsaturated

Saturated

None of these

Supersaturated

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

Mole fraction of Solvent

Molality

Molarity

Mole fraction of solute

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

Osmotic pressure

Elevation of polling point

Lowering of vapour pressure

Freezing point

36. The osmotic pressure of solution increases if

Number of solute molecules are increased

Volume is increased

Temperature is decreased

Solution constant is increased

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

1 normal solution

1 Molar solution

None of these

1 mole solution

38. 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).

3.60 eq

1.20 eq

2.40 eq

0.600 eq

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

Osmotic pressure

Depression of freezing point

Elevation of boiling point

Density

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

Ideal solution

Azeotropic solution

Non-ideal solution

Zeotropic solution

41. The lowest vapour pressure is exerted by

Ethanol

Methanol

Chloroform

Water

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

Molarity

Molality

All

Mole fraction

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

H₂O and HBr.

C₆H₆ and CCI₄

C₂H₅OH and H₂O

CHCI₃ and CH₃ 100 CH₃

44. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% w/w

% v/w

% v/v

% w/v

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

Amorphous

Super saturated

Azeotropic mixture

Ideal

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

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

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

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

Formality

Molality

Mole fraction

Molarity

48. 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.)

0.045 N

0.066 N

0.033 N

0.090 N

49. Depression in freezing point is directly to

Molarity of solvent

Molarity of solution

Molality of solution

Molality of solvent

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

Saturated solution

Dilute

All of these

Concentrated

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

More fraction of solvent

The mole fraction of Solute

Molecular weight of the solvent

Pressure of the atmosphere

52. Maximum F.P falls in

Camphor

Naphthalene

Water

Benzene

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

Molality

Mole fraction

Normality

Molarity

54. The liquid pair which is not completely miscible

Phenol and water

Alcohol and water

CH₃OH and water

Benzene and toluene

55. Which one will from an ideal solution?

CHCI₃ and CH₃COOCH₃

H₂O and HBr.

C₆H₆ and CCI₄

C₂H₅OH and H₂O

56. Units of molarity are

Mol/lit

None

Gm/lit

Kg/lit

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

Compound

Solution

Ion

Radical

58. Which of the following is a colligative property?

Freezing point

Osmotic pressure

Melting point

Sublimation temperature

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

Dilute solution

Non-electrolyte solute

All of these

Non-volatile solute

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

Depression in freezing pint

Osmotic pressure

Elevation of boiling point

Modification of refractive index

61. Which inorganic precipitate acts as semipermeable membrane?

Barium oxalate

Copper ferrocyanide

Calcium sulphate

Nickel phosphate

62. Beckmann’s apparatus is used to measure

Pressure

Depression in F.P

Temperature

B.P elevation

63. Isotonic solutions have same

Normality

Molar concentration

Molality

None of these

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

Coordinate compounds

Double salts

Hydrates

Complexes

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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

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