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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 method is used for compounds which are

None

Both A and B

Thermally unstable

Volatile

2. After filtration slow cooling yields

Smaller & pure

Smaller & impure

Bigger & pure crystals

Bigger & impure crystals

3. Examples of sublimate does not include

Ammonium salts

Nitrates

Iodine

Naphthalene

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

Residue

Mud

Crystal

Steel

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

Volatile or thermally stable

Non-volatile or thermally unstable

Nonvolatile or thermally stable

6. The crystals are drying through a

Vacuum pump

None

Direct providing heat

Vacuum desiccator

7. Sintered crucible is made up of

Glass

Porcelain

Plastic

Filer

8. The conversion of vapors directly into solid is called

Freezing

Condensation

None

Sublimation

9. During the process of crystallization the hot saturated solution

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

Cooled at a moderate rate to get medium sized crystals

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

Volatile or thermally unstable

Non – volatile or thermally stable

Non – volatile or thermally unstable

Volatile or thermally stable

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

A solid compound is purified

It is used to separate organic compounds from water

It keeps the stem of funnel full of liquid

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

12. One of the following does not sublime

Naphthalene

Wax

NH₄Cl

Iodine

13. Safe and reliable method of drying crystal in through

Drying it in oven

Vacuum desiccator

Pressing it between folds of filter paper

Evaporation of solution

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

Nature of reaction

Nature of reactants

Nature of filter paper

Nature of precipitate

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

KBr

KC1

NaC1

16. Chromatography is important in

Determination of purity

All of these

Qualitative analysis

Quantitative analysis

17. The dried paper containing pattern on paper is called

Chromophore

Chrome

Chromatogram

Chromatograph

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

Avoided

Crystallization does not involve heating

Needed

Depends on temperature

19. Sintered glass crucible is used for

Separation of two miscible liquids

Convenient filtration than that by Gooch crucible

Purification of slid

To avoid premature crystallization of solute

20. Which one is not the drying agent

Phosphorus penta-oxide

Cacl₂

Silica gel

CaOCl

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

Amount of solute

Distribution law

Amount of solute used

Law of mass action

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

180⁰

90⁰

80⁰

60⁰

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

Filtration

Crystallization

Separation

Condensation

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

Law of mass action

The amount of solute

Distribution law

The amount of solvent used

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

Temperature of the experiment

Size of the chromatographic tank used

Rf values of solutes

The size of paper used

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26. CaC1₂ ad P₂O₅ are used as

Reside agents

Drying agents

Deleting agents

Crystallizing agents

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

Fluted filter

Ordinary filter paper

Fine filter paper

Under suction crucible

28. 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

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

Chromatography

Filtration

Solvent extraction

Crystallization

30. The technique of chromatography is used in

All

Purification

Separation

Isolation

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

Chloroform

Acetic acid

Ethanol

Carbon tetrachloride

32. 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 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

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

Wire gauze

Thermostat

Ice bath

Water bath

34. Gooch crucible is used to filter the solution of

KMnO4

KOH

Under suction crucible

K2Cr2O7

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

High solubility

High concentration

High ignition temperature

Low temperature

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

Distribution law

Boiling point of solvent

Distribution coefficient

Low partial pressures

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

Chromatography

Sublimation

Filtration

Solvent extraction

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

Fast

Time consuming

Difficult

Accurate

39. Which type of chromatography has fixed phase

None of these

Gas

Partition

Absorption

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

Boiling

Solvent extraction

Sublimation

Filtration

41. 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

42. 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

43. Paper chromatography is a type

None

Absorption chromatography

Adsorption chromatography

Partition chromatography

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

Adsorption chromatography

Absorption chromatography

None

Partition chromatography

45. A process controlled by distribution law is

Crystallization

Sublimation

Solvent extraction

Filtration

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

Distribution law

Distribution coefficients

Law of partial pressure

Law of specific proportion

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

Formation of solution and filtration

Chromatography

Sublimation

Formation of solution and evaporation

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

The stem of the funnel should be small

The tip of funnel should not touch the beaker

The filter paper should be small

The stem of the funnel should remain continuously full of liquids

49. The most common example of solvent extraction is

Ether

Chloroform

Acetone

Naphthalene

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

Measurement

Identification

Calculation

Separation

Page 3 of 3

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

Event

Solvent front

Chromatogram

Base line

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

Sublimation

Decomposing

Condensing

Melting

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

Oven

Filter paper

None

Desicator

54. The process of filtration is used to

Separate solute from solution

Separate the two immiscible liquids

Separate insoluble particles from liquids

Separate the two miscible liquids

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

Crystallization

Chromatography

Filtration

Sublimation

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

Filtering cold solution

Filtering hot saturated solution using hot funnel

Filling warm solution

Quick filtration

57. Condensed solid produced during sublimation is

Insoluble

Sublimate

Residue

Crystal

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

It should deposit well-formed crystals of the pure compound

Quick filtration can be done

For preparation of chemical compound

It dissolves a large amount of the substance

59. 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

60. Iodine-salt mixture can be separated through

Simple distillation

Simple filtration

Fractional distillation

Sublimation

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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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