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Chemistry Experimental Techniques Online Mcqs Test

Malik TahirLast Updated: October 14, 2025

Important Chemistry Experimental Techniques Question and Answer

Total Questions:	60
Time Allowed:	30 Minutes
Total Marks:	60
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 Experimental Techniques Practice Test Online With Explanation

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Page 1 of 3

Chemistry

1. Solvent extraction is an equilibrium process and it is controlled by

Amount of solute used

Amount of solute

Distribution law

Law of mass action

2. A filtration process could be very time consuming if it were not aided by the gentle suction, which is developed

If the paper fits tightly

If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

3. Paper chromatography is a type

Adsorption chromatography

None

Partition chromatography

Absorption chromatography

4. Rate of filtration through conical funnel can be considerably increased by using

Fluted filter

Under suction crucible

Ordinary filter paper

Fine filter paper

5. The process of filtration is used to

Separate insoluble particles from liquids

Separate the two immiscible liquids

Separate the two miscible liquids

Separate solute from solution

6. In crystallization, if the solvent is inflammable then direct heating is

Needed

Crystallization does not involve heating

Avoided

Depends on temperature

7. Aqueous solution of iodine is prepared first by dissolving which compound in water

NaC1

KC1

KBr

8. For smooth filtration one of the following precautions should be observed

The stem of the funnel should remain continuously full of liquids

The tip of funnel should not touch the beaker

The stem of the funnel should be small

The filter paper should be small

9. When a solid which has high vapor pressure at a temperature below its boiling point, is heated it starts:

Melting

Sublimation

Decomposing

Condensing

10. Solvent extraction method is particularly useful technique for separation, when product to be separated is

Non-volatile or thermally unstable

Nonvolatile or thermally stable

Volatile or thermally stable

11. Which of the following is not a separation technique?

Sublimation

Solvent extraction

Filtration

Boiling

12. In paper chromatography the rate at which solutes move depends on

Law of specific proportion

Law of partial pressure

Distribution law

Distribution coefficients

13. Which one of the following techniques can be used to separate NaC1 and sand?

Formation of solution and evaporation

Chromatography

Formation of solution and filtration

Sublimation

14. If the solvent is inflammable for heating purpose we use

Ice bath

Thermostat

Wire gauze

Water bath

15. An insoluble solid can be separated from a liquid by

Crystallization

Sublimation

Chromatography

Filtration

16. Which one is the property of an ideal solvent?

Should be safe to use

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be expensive

17. A comparative rates at which the solutes move in the paper chromatography depends on

Their partition coefficients

Used

Their Rf values

The size of paper used

18. I₂ present in water can be extracted by using which of the following solvent

Carbon tetrachloride

Acetic acid

Ethanol

Chloroform

19. One of the following does not sublime

Wax

NH₄Cl

Naphthalene

Iodine

20. Safe and reliable method of drying crystal in through

Evaporation of solution

Vacuum desiccator

Drying it in oven

Pressing it between folds of filter paper

21. During the folding of filter paper the apex form angle of about

80⁰

60⁰

180⁰

90⁰

22. Premature crystallization of solution of filter paper or in funnel can be avoided

Filtering hot saturated solution using hot funnel

Quick filtration

Filtering cold solution

Filling warm solution

23. The solid which is left over the filter paper is called

Crystal

Steel

Mud

Residue

24. Which type of chromatography has fixed phase

None of these

Absorption

Gas

Partition

25. Sintered glass crucible is used for

To avoid premature crystallization of solute

Convenient filtration than that by Gooch crucible

Separation of two miscible liquids

Purification of slid

Page 2 of 3

26. Which one is not the drying agent

CaOCl

Cacl₂

Silica gel

Phosphorus penta-oxide

27. Solvent extraction method is particularly useful technique for separation when the product to be separated is

Volatile or thermally unstable

Volatile or thermally stable

Non – volatile or thermally stable

Non – volatile or thermally unstable

28. A process controlled by distribution law is

Sublimation

Crystallization

Filtration

Solvent extraction

29. CaC1₂ ad P₂O₅ are used as

Drying agents

Reside agents

Crystallizing agents

Deleting agents

30. Chromatography is important in

Qualitative analysis

Determination of purity

Quantitative analysis

All of these

31. Gooch crucible is used for the filtration of precipitates having

Low temperature

High concentration

High ignition temperature

High solubility

32. The technique of chromatography is used in

Purification

Separation

All

Isolation

33. During the process of crystallization the hot saturated solution

Cooled at a moderate rate to get medium sized crystals

Evaporated to get the crystals of the product

Mixed with an miscible liquid to get the pure crystals of the product

Cooled very slowly to get large sized crystals

34. Examples of sublimate does not include

Naphthalene

Iodine

Ammonium salts

Nitrates

35. The iodine present in water can be separated by which one of the following techniques

Solvent extraction

Chromatography

Filtration

Sublimation

36. Solvent extraction is an equilibrium process and it is controlled by

The amount of solvent used

Law of mass action

The amount of solute

Distribution law

37. The rate at which the solute moves in paper chromatography depends upon

Boiling point of solvent

Distribution law

Low partial pressures

Distribution coefficient

38. In paper chromatography the point at which the solvent rises to maximum extent is called

Chromatogram

Event

Base line

Solvent front

39. Gooch crucible is used to filter the solution of

KOH

KMnO4

Under suction crucible

K2Cr2O7

40. Which of the following is directly related to Qualitative analysis?

Identification

Calculation

Separation

Measurement

41. The conversion of vapors directly into solid is called

None

Condensation

Freezing

Sublimation

42. The process involves converting a solid directly into vapors and these vapors are the condensed to form solid again is called

Evaporation

Sublimation

Crystallization

Decomposition

43. Which pairs of the following components can be separated by sublimation?

Sand and broken pieces of glass

Nacl and Kcl

Sand and Nacl

Sand and naphthalene

44. Condensed solid produced during sublimation is

Insoluble

Sublimate

Residue

Crystal

45. The most common example of solvent extraction is

Ether

Acetone

Naphthalene

Chloroform

46. The crystals are drying through a

Vacuum desiccator

Direct providing heat

Vacuum pump

None

47. The comparative rates at which the solutes move in paper chromatography depend on

Rf values of solutes

Size of the chromatographic tank used

Temperature of the experiment

The size of paper used

48. The dried paper containing pattern on paper is called

Chromatograph

Chromatogram

Chromophore

Chrome

49. Several types of filter media are used for filtration depending on

Nature of precipitate

Nature of filter paper

Nature of reaction

Nature of reactants

50. Which of the following process is used to separate insoluble particles from liquids?

Condensation

Crystallization

Filtration

Separation

Page 3 of 3

51. After filtration slow cooling yields

Bigger & pure crystals

Smaller & pure

Smaller & impure

Bigger & impure crystals

52. Safe and most reliable method of drying the crystals is

Desicator

Filter paper

None

Oven

53. Solvent extraction method is used for compounds which are

None

Thermally unstable

Both A and B

Volatile

54. Filtration through Gooch and sintered glass crucibles is aided by a gentle suction

It should deposit well-formed crystals of the pure compound

For preparation of chemical compound

It dissolves a large amount of the substance

Quick filtration can be done

55. Chromatography in which the stationary phase is liquid is called

Absorption chromatography

Adsorption chromatography

None

Partition chromatography

56. Sintered crucible is made up of

Glass

Filer

Plastic

Porcelain

57. Filtration by a glass funnel and filter paper is very

Difficult

Accurate

Time consuming

Fast

58. Which of the following technique is used for the separation of insoluble particles from liquids?

Crystallization

Filtration

Chromatography

Solvent extraction

59. Iodine-salt mixture can be separated through

Sublimation

Simple filtration

Fractional distillation

Simple distillation

60. Gooch crucible is used in a suction filtering apparatus, because

It keeps the stem of funnel full of liquid

It is used to separate organic compounds from water

A solid compound is purified

It is used for filtration of precipitates which need to be ignited

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Malik TahirLast Updated: October 14, 2025

Chemistry Experimental Techniques Online Mcqs Test

Important Chemistry Experimental Techniques Question and Answer

Chemistry Experimental Techniques Practice Test Online With Explanation

Chemistry

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