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. Gooch crucible is used to filter the solution of

KOH

K2Cr2O7

Under suction crucible

KMnO4

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

Amount of solute used

Distribution law

Amount of solute

Law of mass action

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

Decomposing

Condensing

Sublimation

Melting

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

Nacl and Kcl

Sand and naphthalene

Sand and broken pieces of glass

Sand and Nacl

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

Chromatography

Sublimation

Filtration

Solvent extraction

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

Sublimation

Formation of solution and evaporation

Formation of solution and filtration

Chromatography

7. A process controlled by distribution law is

Filtration

Solvent extraction

Crystallization

Sublimation

8. Solvent extraction method is used for compounds which are

None

Volatile

Both A and B

Thermally unstable

9. Examples of sublimate does not include

Nitrates

Iodine

Ammonium salts

Naphthalene

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

90⁰

80⁰

180⁰

60⁰

11. CaC1₂ ad P₂O₅ are used as

Drying agents

Reside agents

Deleting agents

Crystallizing agents

12. One of the following does not sublime

NH₄Cl

Iodine

Naphthalene

Wax

13. The most common example of solvent extraction is

Ether

Naphthalene

Acetone

Chloroform

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

Used

Their partition coefficients

The size of paper used

Their Rf values

15. Sintered glass crucible is used for

Convenient filtration than that by Gooch crucible

To avoid premature crystallization of solute

Separation of two miscible liquids

Purification of slid

16. Which type of chromatography has fixed phase

Partition

Absorption

None of these

Gas

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

Adsorption chromatography

Partition chromatography

Absorption chromatography

None

18. 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

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

A solid compound is purified

19. The process of filtration is used to

Separate solute from solution

Separate the two immiscible liquids

Separate the two miscible liquids

Separate insoluble particles from liquids

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

Solvent extraction

Chromatography

Crystallization

Filtration

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

NaC1

KBr

KC1

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

Law of specific proportion

Distribution law

Law of partial pressure

Distribution coefficients

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

If the paper covers the funnel up to its circumference

If the paper fits tightly

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

If the paper has got small sized pores in it

24. The crystals are drying through a

None

Direct providing heat

Vacuum pump

Vacuum desiccator

25. After filtration slow cooling yields

Bigger & impure crystals

Smaller & impure

Bigger & pure crystals

Smaller & pure

Page 2 of 3

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

Crystallization

Decomposition

Sublimation

Evaporation

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

Fine filter paper

Ordinary filter paper

Under suction crucible

Fluted filter

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

Thermostat

Wire gauze

Ice bath

Water bath

29. Condensed solid produced during sublimation is

Sublimate

Insoluble

Residue

Crystal

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

Time consuming

Accurate

Fast

Difficult

31. The conversion of vapors directly into solid is called

Sublimation

Condensation

None

Freezing

32. Paper chromatography is a type

Adsorption chromatography

Partition chromatography

None

Absorption chromatography

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

High concentration

Low temperature

High solubility

High ignition temperature

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

Quick filtration

Filtering hot saturated solution using hot funnel

Filtering cold solution

Filling warm solution

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

Distribution law

The amount of solute

Law of mass action

The amount of solvent used

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

Calculation

Measurement

Identification

Separation

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

Carbon tetrachloride

Chloroform

Acetic acid

Ethanol

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

Filtration

Chromatography

Sublimation

Crystallization

39. Safe and reliable method of drying crystal in through

Drying it in oven

Pressing it between folds of filter paper

Vacuum desiccator

Evaporation of solution

40. The dried paper containing pattern on paper is called

Chromatogram

Chromatograph

Chrome

Chromophore

41. Which one is not the drying agent

CaOCl

Silica gel

Phosphorus penta-oxide

Cacl₂

42. During the process of crystallization the hot saturated solution

Cooled at a moderate rate to get medium sized crystals

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

Evaporated to get the crystals of the product

Cooled very slowly to get large sized crystals

43. Iodine-salt mixture can be separated through

Simple filtration

Simple distillation

Sublimation

Fractional distillation

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

Nature of reactants

Nature of precipitate

Nature of reaction

Nature of filter paper

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

Should be expensive

Should be safe to use

Impurities should crystallize along with the solute

It should react chemically with the solute

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

The stem of the funnel should remain continuously full of liquids

The stem of the funnel should be small

The tip of funnel should not touch the beaker

The filter paper should be small

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

Boiling point of solvent

Low partial pressures

Distribution law

Distribution coefficient

48. Chromatography is important in

Quantitative analysis

Qualitative analysis

Determination of purity

All of these

49. Sintered crucible is made up of

Porcelain

Plastic

Glass

Filer

50. The technique of chromatography is used in

Isolation

Separation

Purification

All

Page 3 of 3

51. 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

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

Steel

Crystal

Residue

Mud

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

Crystallization does not involve heating

Needed

Depends on temperature

Avoided

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

It should deposit well-formed crystals of the pure compound

It dissolves a large amount of the substance

Quick filtration can be done

For preparation of chemical compound

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

Size of the chromatographic tank used

Rf values of solutes

The size of paper used

Temperature of the experiment

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

Solvent extraction

Filtration

Boiling

Sublimation

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

Filter paper

Oven

None

Desicator

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

Condensation

Filtration

Crystallization

Separation

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

Volatile or thermally unstable

Non – volatile or thermally unstable

Volatile or thermally stable

Non – volatile or thermally stable

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

Base line

Chromatogram

Solvent front

Event

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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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Malik Tahir

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