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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. One of the following does not sublime

Naphthalene

Iodine

NH₄Cl

Wax

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

Partition chromatography

Absorption chromatography

Adsorption chromatography

None

3. Sintered crucible is made up of

Glass

Filer

Porcelain

Plastic

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

Separation

Filtration

Crystallization

Condensation

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

Chromatography

Crystallization

Sublimation

Filtration

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

Amount of solute used

Distribution law

Amount of solute

Law of mass action

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

The filter paper should be small

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

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

The size of paper used

Temperature of the experiment

Size of the chromatographic tank used

Rf values of solutes

9. Which type of chromatography has fixed phase

None of these

Gas

Partition

Absorption

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

Sublimation

Crystallization

Evaporation

Decomposition

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

Boiling point of solvent

Distribution coefficient

Low partial pressures

Distribution law

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

KC1

KBr

NaC1

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

It is used to separate organic compounds from water

It keeps the stem of funnel full of liquid

A solid compound is purified

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

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

Crystallization

Chromatography

Solvent extraction

Filtration

15. After filtration slow cooling yields

Bigger & pure crystals

Bigger & impure crystals

Smaller & impure

Smaller & pure

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

Sublimation

Formation of solution and filtration

Chromatography

Formation of solution and evaporation

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

Sand and Nacl

Sand and naphthalene

Nacl and Kcl

Sand and broken pieces of glass

18. Which one is not the drying agent

CaOCl

Cacl₂

Phosphorus penta-oxide

Silica gel

19. Sintered glass crucible is used for

Convenient filtration than that by Gooch crucible

Purification of slid

Separation of two miscible liquids

To avoid premature crystallization of solute

20. The conversion of vapors directly into solid is called

Sublimation

None

Condensation

Freezing

21. The technique of chromatography is used in

Separation

All

Isolation

Purification

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

Condensing

Sublimation

Melting

Decomposing

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

Distribution law

Law of mass action

The amount of solvent used

The amount of solute

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

Sublimation

Boiling

Filtration

Solvent extraction

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

Crystal

Residue

Steel

Mud

Page 2 of 3

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

Ethanol

Acetic acid

Chloroform

Carbon tetrachloride

27. The crystals are drying through a

Vacuum pump

Direct providing heat

None

Vacuum desiccator

28. 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

Cooled very slowly to get large sized crystals

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

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

Crystallization does not involve heating

Avoided

Needed

Depends on temperature

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

Ice bath

Water bath

Thermostat

Wire gauze

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

Their partition coefficients

Their Rf values

The size of paper used

Used

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

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

If the paper covers the funnel up to its circumference

If the paper fits tightly

33. Safe and reliable method of drying crystal in through

Drying it in oven

Evaporation of solution

Pressing it between folds of filter paper

Vacuum desiccator

34. Paper chromatography is a type

Partition chromatography

Absorption chromatography

Adsorption chromatography

None

35. Examples of sublimate does not include

Iodine

Ammonium salts

Nitrates

Naphthalene

36. A process controlled by distribution law is

Solvent extraction

Crystallization

Filtration

Sublimation

37. Chromatography is important in

Quantitative analysis

Qualitative analysis

All of these

Determination of purity

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

Filter paper

Oven

None

Desicator

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

It dissolves a large amount of the substance

For preparation of chemical compound

It should deposit well-formed crystals of the pure compound

Quick filtration can be done

40. The process of filtration is used to

Separate the two immiscible liquids

Separate the two miscible liquids

Separate insoluble particles from liquids

Separate solute from solution

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

Non-volatile or thermally unstable

Volatile or thermally stable

Nonvolatile or thermally stable

Non-volatile or thermally unstable

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

Identification

Separation

Measurement

Calculation

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

Impurities should crystallize along with the solute

Should be expensive

Should be safe to use

It should react chemically with the solute

44. The dried paper containing pattern on paper is called

Chromophore

Chrome

Chromatograph

Chromatogram

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

Accurate

Time consuming

Fast

Difficult

46. Solvent extraction method is used for compounds which are

Both A and B

Volatile

Thermally unstable

None

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

Filtration

Solvent extraction

Chromatography

Sublimation

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

Distribution coefficients

Law of specific proportion

Distribution law

Law of partial pressure

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

Filtering hot saturated solution using hot funnel

Quick filtration

Filling warm solution

Filtering cold solution

50. 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

Non – volatile or thermally stable

Volatile or thermally stable

Page 3 of 3

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

High ignition temperature

High concentration

Low temperature

High solubility

52. Iodine-salt mixture can be separated through

Fractional distillation

Simple filtration

Sublimation

Simple distillation

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

Nature of filter paper

Nature of reaction

Nature of reactants

Nature of precipitate

54. Condensed solid produced during sublimation is

Insoluble

Residue

Sublimate

Crystal

55. Gooch crucible is used to filter the solution of

K2Cr2O7

KOH

KMnO4

Under suction crucible

56. CaC1₂ ad P₂O₅ are used as

Drying agents

Reside agents

Crystallizing agents

Deleting agents

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

Solvent front

Base line

Event

Chromatogram

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

Under suction crucible

Fine filter paper

Ordinary filter paper

Fluted filter

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

90⁰

60⁰

80⁰

180⁰

60. The most common example of solvent extraction is

Ether

Acetone

Naphthalene

Chloroform

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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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