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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 conversion of vapors directly into solid is called

Freezing

Condensation

None

Sublimation

2. Which type of chromatography has fixed phase

None of these

Gas

Absorption

Partition

3. The dried paper containing pattern on paper is called

Chromophore

Chromatogram

Chrome

Chromatograph

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

Nature of filter paper

Nature of reaction

Nature of precipitate

Nature of reactants

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

Melting

Sublimation

Condensing

Decomposing

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

None

Adsorption chromatography

Absorption chromatography

Partition chromatography

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

Separation

Crystallization

Filtration

Condensation

8. 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

9. The most common example of solvent extraction is

Ether

Chloroform

Naphthalene

Acetone

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

Filtration

Solvent extraction

Boiling

Sublimation

11. Condensed solid produced during sublimation is

Residue

Insoluble

Crystal

Sublimate

12. Which one is not the drying agent

Silica gel

Cacl₂

CaOCl

Phosphorus penta-oxide

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

Needed

Avoided

Crystallization does not involve heating

Depends on temperature

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

Chromatography

Crystallization

Filtration

Solvent extraction

15. Chromatography is important in

Determination of purity

All of these

Qualitative analysis

Quantitative analysis

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

80⁰

90⁰

180⁰

60⁰

17. 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

18. The crystals are drying through a

None

Direct providing heat

Vacuum desiccator

Vacuum pump

19. Sintered glass crucible is used for

Separation of two miscible liquids

Convenient filtration than that by Gooch crucible

To avoid premature crystallization of solute

Purification of slid

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

The amount of solvent used

The amount of solute

Distribution law

Law of mass action

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

Base line

Chromatogram

Event

Solvent front

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

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

A solid compound is purified

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

Crystallization

Chromatography

Filtration

Sublimation

24. Examples of sublimate does not include

Ammonium salts

Iodine

Nitrates

Naphthalene

25. A process controlled by distribution law is

Filtration

Sublimation

Solvent extraction

Crystallization

Page 2 of 3

26. After filtration slow cooling yields

Bigger & impure crystals

Bigger & pure crystals

Smaller & pure

Smaller & impure

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

Ordinary filter paper

Fluted filter

Fine filter paper

Under suction crucible

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

The size of paper used

Used

Their partition coefficients

Their Rf values

29. The technique of chromatography is used in

Isolation

All

Separation

Purification

30. Gooch crucible is used to filter the solution of

K2Cr2O7

KOH

KMnO4

Under suction crucible

31. 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 fits tightly

If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

32. CaC1₂ ad P₂O₅ are used as

Reside agents

Deleting agents

Crystallizing agents

Drying agents

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

Distribution coefficient

Boiling point of solvent

Low partial pressures

Distribution law

34. Sintered crucible is made up of

Filer

Plastic

Glass

Porcelain

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

Distribution coefficients

Law of partial pressure

Law of specific proportion

Distribution law

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

Amount of solute

Amount of solute used

Distribution law

Law of mass action

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

Carbon tetrachloride

Acetic acid

Ethanol

Chloroform

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

Residue

Steel

Crystal

Mud

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

Volatile or thermally unstable

Non – volatile or thermally unstable

Non – volatile or thermally stable

Volatile or thermally stable

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

Filter paper

Oven

Desicator

None

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

Calculation

Measurement

Separation

Identification

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

Sublimation

Formation of solution and evaporation

Formation of solution and filtration

Chromatography

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

The size of paper used

Temperature of the experiment

Size of the chromatographic tank used

Rf values of solutes

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

Sublimation

Crystallization

Evaporation

Decomposition

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

NaC1

KBr

KC1

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

Ice bath

Wire gauze

Water bath

Thermostat

47. One of the following does not sublime

Naphthalene

Wax

NH₄Cl

Iodine

48. 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

49. Iodine-salt mixture can be separated through

Simple distillation

Simple filtration

Sublimation

Fractional distillation

50. 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 tip of funnel should not touch the beaker

The filter paper should be small

Page 3 of 3

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

Low temperature

High solubility

High concentration

High ignition temperature

52. 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

It dissolves a large amount of the substance

For preparation of chemical compound

53. Safe and reliable method of drying crystal in through

Vacuum desiccator

Drying it in oven

Evaporation of solution

Pressing it between folds of filter paper

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

Chromatography

Solvent extraction

Sublimation

Filtration

55. 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

56. 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

57. Solvent extraction method is used for compounds which are

None

Both A and B

Volatile

Thermally unstable

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

Difficult

Accurate

Time consuming

Fast

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

Nacl and Kcl

Sand and broken pieces of glass

Sand and Nacl

Sand and naphthalene

60. Paper chromatography is a type

None

Adsorption chromatography

Absorption chromatography

Partition chromatography

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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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