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 for the filtration of precipitates having

Low temperature

High ignition temperature

High solubility

High concentration

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

Distribution coefficient

Boiling point of solvent

Low partial pressures

Distribution law

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

Crystallization

Chromatography

Filtration

Sublimation

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

Avoided

Depends on temperature

Needed

Crystallization does not involve heating

5. Sintered crucible is made up of

Glass

Filer

Plastic

Porcelain

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

Distribution coefficients

Distribution law

Law of partial pressure

Law of specific proportion

7. 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

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

Measurement

Identification

Calculation

Separation

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

Filter paper

Desicator

Oven

None

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

Thermostat

Water bath

Wire gauze

Ice bath

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

Nature of precipitate

Nature of filter paper

Nature of reaction

Nature of reactants

12. The dried paper containing pattern on paper is called

Chromatogram

Chromophore

Chromatograph

Chrome

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

Nonvolatile or thermally stable

Non-volatile or thermally unstable

Volatile or thermally stable

Non-volatile or thermally unstable

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

Crystallization

Chromatography

Solvent extraction

Filtration

15. Chromatography is important in

Determination of purity

All of these

Quantitative analysis

Qualitative analysis

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

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

It keeps the stem of funnel full of liquid

It is used to separate organic compounds from water

A solid compound is purified

17. The crystals are drying through a

Direct providing heat

Vacuum pump

None

Vacuum desiccator

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

Filtration

Chromatography

Solvent extraction

Sublimation

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

The size of paper used

Size of the chromatographic tank used

Temperature of the experiment

Rf values of solutes

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

The tip of funnel should not touch the beaker

The stem of the funnel should remain continuously full of liquids

The stem of the funnel should be small

The filter paper should be small

21. After filtration slow cooling yields

Smaller & pure

Bigger & impure crystals

Smaller & impure

Bigger & pure crystals

22. Gooch crucible is used to filter the solution of

KMnO4

KOH

Under suction crucible

K2Cr2O7

23. A process controlled by distribution law is

Sublimation

Crystallization

Filtration

Solvent extraction

24. CaC1₂ ad P₂O₅ are used as

Drying agents

Crystallizing agents

Reside agents

Deleting agents

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

KBr

NaC1

KC1

Page 2 of 3

26. One of the following does not sublime

Naphthalene

Iodine

NH₄Cl

Wax

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

None

Adsorption chromatography

Absorption chromatography

Partition chromatography

28. The process of filtration is used to

Separate solute from solution

Separate the two miscible liquids

Separate insoluble particles from liquids

Separate the two immiscible liquids

29. Which type of chromatography has fixed phase

Partition

Gas

Absorption

None of these

30. Which one is not the drying agent

Silica gel

Cacl₂

CaOCl

Phosphorus penta-oxide

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

Separation

Condensation

Crystallization

Filtration

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

Sublimation

Decomposition

Crystallization

Evaporation

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

90⁰

180⁰

80⁰

60⁰

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

The amount of solute

Law of mass action

The amount of solvent used

Distribution law

35. Sintered glass crucible is used for

To avoid premature crystallization of solute

Purification of slid

Convenient filtration than that by Gooch crucible

Separation of two miscible liquids

36. Examples of sublimate does not include

Iodine

Ammonium salts

Naphthalene

Nitrates

37. The technique of chromatography is used in

All

Purification

Isolation

Separation

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

Fine filter paper

Fluted filter

Under suction crucible

Ordinary filter paper

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

Sand and naphthalene

Nacl and Kcl

Sand and Nacl

Sand and broken pieces of glass

40. The conversion of vapors directly into solid is called

Sublimation

None

Condensation

Freezing

41. 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

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

Law of mass action

Amount of solute used

Distribution law

Amount of solute

43. Safe and reliable method of drying crystal in through

Vacuum desiccator

Drying it in oven

Pressing it between folds of filter paper

Evaporation of solution

44. 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

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

It dissolves a large amount of the substance

Quick filtration can be done

For preparation of chemical compound

It should deposit well-formed crystals of the pure compound

46. Paper chromatography is a type

Absorption chromatography

Adsorption chromatography

None

Partition chromatography

47. Iodine-salt mixture can be separated through

Fractional distillation

Simple distillation

Sublimation

Simple filtration

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

Melting

Condensing

Decomposing

Sublimation

49. Condensed solid produced during sublimation is

Sublimate

Crystal

Residue

Insoluble

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

Filtering cold solution

Quick filtration

Filtering hot saturated solution using hot funnel

Filling warm solution

Page 3 of 3

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

Accurate

Fast

Difficult

Time consuming

52. Solvent extraction method is used for compounds which are

Thermally unstable

Volatile

None

Both A and B

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

Steel

Residue

Mud

Crystal

54. During the process of crystallization the hot saturated solution

Cooled at a moderate rate to get medium sized crystals

Cooled very slowly to get large sized crystals

Evaporated to get the crystals of the product

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

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

Carbon tetrachloride

Acetic acid

Chloroform

Ethanol

56. The most common example of solvent extraction is

Acetone

Chloroform

Ether

Naphthalene

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

Event

Solvent front

Chromatogram

Base line

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

Sublimation

Solvent extraction

Filtration

Boiling

59. 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

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

Non – volatile or thermally stable

Volatile or thermally stable

Volatile or thermally unstable

Non – volatile or thermally unstable

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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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