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

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

The tip of funnel should not touch the beaker

2. After filtration slow cooling yields

Smaller & impure

Bigger & pure crystals

Smaller & pure

Bigger & impure crystals

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

Boiling

Solvent extraction

Filtration

Sublimation

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

Sublimation

Melting

Decomposing

Condensing

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

High solubility

Low temperature

High ignition temperature

High concentration

6. 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

7. Examples of sublimate does not include

Ammonium salts

Iodine

Nitrates

Naphthalene

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

Needed

Depends on temperature

Avoided

Crystallization does not involve heating

9. The technique of chromatography is used in

All

Purification

Isolation

Separation

10. Which type of chromatography has fixed phase

Gas

Absorption

None of these

Partition

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

Base line

Solvent front

Chromatogram

Event

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

Nonvolatile or thermally stable

Volatile or thermally stable

Non-volatile or thermally unstable

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

Time consuming

Difficult

Accurate

Fast

14. The conversion of vapors directly into solid is called

None

Sublimation

Condensation

Freezing

15. One of the following does not sublime

NH₄Cl

Naphthalene

Wax

Iodine

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

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

It is used to separate organic compounds from water

17. Which one is not the drying agent

Silica gel

CaOCl

Phosphorus penta-oxide

Cacl₂

18. Condensed solid produced during sublimation is

Insoluble

Residue

Crystal

Sublimate

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

Partition chromatography

Adsorption chromatography

None

Absorption chromatography

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

Amount of solute

Amount of solute used

Distribution law

Law of mass action

21. CaC1₂ ad P₂O₅ are used as

Reside agents

Drying agents

Deleting agents

Crystallizing agents

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

Desicator

Oven

Filter paper

None

23. 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 fits tightly

If the paper covers the funnel up to its circumference

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

Crystallization

Sublimation

Chromatography

Filtration

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

Ethanol

Chloroform

Acetic acid

Carbon tetrachloride

Page 2 of 3

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

Nature of filter paper

Nature of reactants

Nature of reaction

Nature of precipitate

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

It should deposit well-formed crystals of the pure compound

It dissolves a large amount of the substance

For preparation of chemical compound

Quick filtration can be done

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

Solvent extraction

Chromatography

Filtration

Sublimation

29. During the process of crystallization the hot saturated solution

Evaporated to get the crystals of the product

Cooled at a moderate rate to get medium sized crystals

Cooled very slowly to get large sized crystals

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

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

Water bath

Ice bath

Wire gauze

Thermostat

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

Steel

Residue

Mud

Crystal

32. A process controlled by distribution law is

Crystallization

Solvent extraction

Sublimation

Filtration

33. Paper chromatography is a type

Adsorption chromatography

None

Partition chromatography

Absorption chromatography

34. 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

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

KBr

KC1

NaC1

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

Volatile or thermally stable

Volatile or thermally unstable

Non – volatile or thermally stable

Non – volatile or thermally unstable

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

Condensation

Separation

Filtration

Crystallization

38. 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

39. The crystals are drying through a

Vacuum pump

Direct providing heat

Vacuum desiccator

None

40. 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

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

Ordinary filter paper

Fluted filter

Fine filter paper

Under suction crucible

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

Nacl and Kcl

Sand and naphthalene

Sand and Nacl

Sand and broken pieces of glass

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

Chromatography

Filtration

Crystallization

Solvent extraction

44. Chromatography is important in

Qualitative analysis

All of these

Determination of purity

Quantitative analysis

45. Sintered crucible is made up of

Filer

Glass

Plastic

Porcelain

46. Gooch crucible is used to filter the solution of

Under suction crucible

KMnO4

K2Cr2O7

KOH

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

Used

Their Rf values

Their partition coefficients

The size of paper used

48. Sintered glass crucible is used for

Purification of slid

Convenient filtration than that by Gooch crucible

Separation of two miscible liquids

To avoid premature crystallization of solute

49. The dried paper containing pattern on paper is called

Chromatogram

Chromatograph

Chrome

Chromophore

50. The most common example of solvent extraction is

Chloroform

Naphthalene

Ether

Acetone

Page 3 of 3

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

Evaporation

Sublimation

Decomposition

Crystallization

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

Law of partial pressure

Law of specific proportion

Distribution law

Distribution coefficients

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

Impurities should crystallize along with the solute

Should be safe to use

It should react chemically with the solute

Should be expensive

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

Measurement

Separation

Calculation

Identification

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

Filtering hot saturated solution using hot funnel

Filling warm solution

Filtering cold solution

Quick filtration

56. 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

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

80⁰

180⁰

90⁰

60⁰

58. Iodine-salt mixture can be separated through

Simple filtration

Sublimation

Fractional distillation

Simple distillation

59. Solvent extraction method is used for compounds which are

Volatile

Both A and B

None

Thermally unstable

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

Boiling point of solvent

Distribution coefficient

Low partial pressures

Distribution law

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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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