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MDCAT Chemistry Experimental Techniques Online Test

Malik TahirLast Updated: May 24, 2025

Chemistry Experimental Techniques MCQS Online Test

MDCAT Chemistry Experimental Techniques Chapter Online Test

Total Questions:	60
Time Allowed:	30 Minutes
Total Marks:	60
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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MDCAT Chemistry Experimental Techniques Test

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Page 1 of 3

Chemistry

1. The process of filtration is used to

Separate insoluble particles from liquids

Separate solute from solution

Separate the two miscible liquids

Separate the two immiscible liquids

2. 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

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

Sublimation

Formation of solution and evaporation

Chromatography

Formation of solution and filtration

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

Ethanol

Acetic acid

Carbon tetrachloride

Chloroform

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

Crystal

Steel

Mud

Residue

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

Law of mass action

Amount of solute

Distribution law

Amount of solute used

7. After filtration slow cooling yields

Bigger & impure crystals

Bigger & pure crystals

Smaller & pure

Smaller & impure

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

Nature of precipitate

Nature of filter paper

Nature of reaction

Nature of reactants

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

Adsorption chromatography

Absorption chromatography

None

Partition chromatography

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

Sand and broken pieces of glass

Sand and naphthalene

Sand and Nacl

Nacl and Kcl

11. A process controlled by distribution law is

Filtration

Crystallization

Sublimation

Solvent extraction

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

Difficult

Fast

Time consuming

Accurate

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

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

If the paper fits tightly

If the paper covers the funnel up to its circumference

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

NaC1

KC1

KBr

15. One of the following does not sublime

NH₄Cl

Wax

Naphthalene

Iodine

16. Condensed solid produced during sublimation is

Crystal

Residue

Insoluble

Sublimate

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

Depends on temperature

Crystallization does not involve heating

Needed

Avoided

18. Which one is not the drying agent

Cacl₂

Phosphorus penta-oxide

Silica gel

CaOCl

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

Distribution coefficients

Distribution law

Law of partial pressure

Law of specific proportion

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

Should be expensive

Should be safe to use

It should react chemically with the solute

Impurities should crystallize along with the solute

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

Crystallization

Solvent extraction

Chromatography

Filtration

22. Examples of sublimate does not include

Ammonium salts

Naphthalene

Nitrates

Iodine

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

High ignition temperature

Low temperature

High solubility

High concentration

24. 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 tip of funnel should not touch the beaker

The stem of the funnel should be small

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

Thermostat

Wire gauze

Ice bath

Water bath

Page 2 of 3

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

It keeps the stem of funnel full of liquid

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

A solid compound is purified

It is used to separate organic compounds from water

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

Sublimation

Crystallization

Chromatography

Filtration

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

Crystallization

Sublimation

Decomposition

Evaporation

29. The technique of chromatography is used in

Separation

Purification

All

Isolation

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

Under suction crucible

Fine filter paper

Fluted filter

Ordinary filter paper

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

Temperature of the experiment

Rf values of solutes

The size of paper used

Size of the chromatographic tank used

32. 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 unstable

Non – volatile or thermally stable

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

Volatile or thermally stable

Nonvolatile or thermally stable

Non-volatile or thermally unstable

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

Separation

Calculation

Measurement

Identification

35. Sintered glass crucible is used for

Separation of two miscible liquids

Purification of slid

Convenient filtration than that by Gooch crucible

To avoid premature crystallization of solute

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

Sublimation

Solvent extraction

Filtration

Chromatography

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

Desicator

Oven

Filter paper

None

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

60⁰

90⁰

80⁰

180⁰

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

Melting

Decomposing

Sublimation

Condensing

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

Boiling point of solvent

Distribution coefficient

Low partial pressures

Distribution law

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

Filling warm solution

Filtering hot saturated solution using hot funnel

Quick filtration

Filtering cold solution

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

Base line

Solvent front

Event

Chromatogram

43. Chromatography is important in

Qualitative analysis

Determination of purity

All of these

Quantitative analysis

44. The crystals are drying through a

None

Direct providing heat

Vacuum desiccator

Vacuum pump

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

Separation

Condensation

Crystallization

Filtration

46. Safe and reliable method of drying crystal in through

Vacuum desiccator

Evaporation of solution

Drying it in oven

Pressing it between folds of filter paper

47. Sintered crucible is made up of

Glass

Porcelain

Filer

Plastic

48. Iodine-salt mixture can be separated through

Fractional distillation

Simple filtration

Sublimation

Simple distillation

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

Solvent extraction

Sublimation

Filtration

Boiling

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

It dissolves a large amount of the substance

It should deposit well-formed crystals of the pure compound

Quick filtration can be done

For preparation of chemical compound

Page 3 of 3

51. During the process of crystallization the hot saturated solution

Cooled very slowly to get large sized crystals

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

52. CaC1₂ ad P₂O₅ are used as

Deleting agents

Crystallizing agents

Drying agents

Reside agents

53. The most common example of solvent extraction is

Ether

Naphthalene

Acetone

Chloroform

54. Solvent extraction method is used for compounds which are

Volatile

None

Thermally unstable

Both A and B

55. The conversion of vapors directly into solid is called

None

Sublimation

Condensation

Freezing

56. The dried paper containing pattern on paper is called

Chromophore

Chromatograph

Chrome

Chromatogram

57. Which type of chromatography has fixed phase

None of these

Gas

Partition

Absorption

58. Gooch crucible is used to filter the solution of

KOH

K2Cr2O7

KMnO4

Under suction crucible

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

Their partition coefficients

The size of paper used

Used

Their Rf values

60. Paper chromatography is a type

Absorption chromatography

Partition chromatography

Adsorption chromatography

None

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Malik TahirLast Updated: May 24, 2025

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MDCAT Chemistry Experimental Techniques Online Test

Chemistry Experimental Techniques MCQS Online Test

MDCAT Chemistry Experimental Techniques Chapter Online Test

MDCAT Chemistry Experimental Techniques Test

Chemistry

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