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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. Which type of chromatography has fixed phase

None of these

Absorption

Partition

Gas

2. 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

3. After filtration slow cooling yields

Smaller & impure

Bigger & impure crystals

Bigger & pure crystals

Smaller & pure

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

Base line

Event

Chromatogram

Solvent front

5. 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

6. The dried paper containing pattern on paper is called

Chrome

Chromatograph

Chromophore

Chromatogram

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

Filtration

Crystallization

Condensation

Separation

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

Solvent extraction

Filtration

Sublimation

Boiling

9. Condensed solid produced during sublimation is

Residue

Sublimate

Crystal

Insoluble

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

Rf values of solutes

Size of the chromatographic tank used

The size of paper used

Temperature of the experiment

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

Distribution coefficient

Distribution law

Boiling point of solvent

Low partial pressures

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

Quick filtration

Filtering hot saturated solution using hot funnel

Filling warm solution

Filtering cold solution

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

Depends on temperature

Needed

Avoided

Crystallization does not involve heating

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

Evaporation

Decomposition

Crystallization

Sublimation

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

Steel

Mud

Crystal

Residue

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

Absorption chromatography

Partition chromatography

None

Adsorption chromatography

17. Sintered crucible is made up of

Filer

Porcelain

Plastic

Glass

18. The technique of chromatography is used in

Purification

All

Isolation

Separation

19. Chromatography is important in

All of these

Quantitative analysis

Qualitative analysis

Determination of purity

20. Solvent extraction method is used for compounds which are

None

Volatile

Both A and B

Thermally unstable

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

Their Rf values

Used

Their partition coefficients

The size of paper used

22. 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

23. 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

Cooled very slowly to get large sized crystals

Evaporated to get the crystals of the product

24. Which one is not the drying agent

Cacl₂

Silica gel

CaOCl

Phosphorus penta-oxide

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

Acetic acid

Carbon tetrachloride

Chloroform

Ethanol

Page 2 of 3

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

Ice bath

Thermostat

Water bath

Wire gauze

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

The amount of solute

The amount of solvent used

Distribution law

Law of mass action

28. The process of filtration is used to

Separate the two miscible liquids

Separate insoluble particles from liquids

Separate the two immiscible liquids

Separate solute from solution

29. Iodine-salt mixture can be separated through

Simple distillation

Fractional distillation

Sublimation

Simple filtration

30. CaC1₂ ad P₂O₅ are used as

Reside agents

Deleting agents

Drying agents

Crystallizing agents

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

None

Desicator

Oven

Filter paper

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

High ignition temperature

Low temperature

High concentration

High solubility

33. Paper chromatography is a type

None

Absorption chromatography

Adsorption chromatography

Partition chromatography

34. The crystals are drying through a

Direct providing heat

Vacuum desiccator

None

Vacuum pump

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

60⁰

90⁰

180⁰

80⁰

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

Chromatography

Crystallization

Filtration

Sublimation

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

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

A solid compound is purified

It keeps the stem of funnel full of liquid

It is used to separate organic compounds from water

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

Difficult

Fast

Time consuming

Accurate

39. Sintered glass crucible is used for

To avoid premature crystallization of solute

Purification of slid

Separation of two miscible liquids

Convenient filtration than that by Gooch crucible

40. Safe and reliable method of drying crystal in through

Pressing it between folds of filter paper

Evaporation of solution

Drying it in oven

Vacuum desiccator

41. Examples of sublimate does not include

Naphthalene

Nitrates

Iodine

Ammonium salts

42. A process controlled by distribution law is

Solvent extraction

Sublimation

Filtration

Crystallization

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

KC1

KBr

NaC1

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

Formation of solution and filtration

Chromatography

Formation of solution and evaporation

Sublimation

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

Quick filtration can be done

For preparation of chemical compound

It should deposit well-formed crystals of the pure compound

It dissolves a large amount of the substance

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

Non-volatile or thermally unstable

Volatile or thermally stable

Non-volatile or thermally unstable

Nonvolatile or thermally stable

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

Measurement

Identification

Calculation

Separation

48. Gooch crucible is used to filter the solution of

Under suction crucible

K2Cr2O7

KOH

KMnO4

49. The conversion of vapors directly into solid is called

Condensation

Freezing

None

Sublimation

50. The most common example of solvent extraction is

Chloroform

Ether

Acetone

Naphthalene

Page 3 of 3

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

The stem of the funnel should remain continuously full of liquids

The filter paper should be small

The tip of funnel should not touch the beaker

The stem of the funnel should be small

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

Fluted filter

Fine filter paper

Ordinary filter paper

Under suction crucible

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

Distribution law

Law of partial pressure

Distribution coefficients

Law of specific proportion

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

Law of mass action

Amount of solute

Amount of solute used

Distribution law

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

Crystallization

Chromatography

Filtration

Solvent extraction

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

Nature of reactants

Nature of precipitate

Nature of filter paper

Nature of reaction

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

Condensing

Melting

Sublimation

Decomposing

58. One of the following does not sublime

Naphthalene

NH₄Cl

Wax

Iodine

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

Filtration

Solvent extraction

Chromatography

Sublimation

60. 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

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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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