Home/ECAT/ECAT Chemistry Experimental Techniques Test Online

ECAT Chemistry Experimental Techniques Test Online

Maan AliLast Updated: April 19, 2025

Chemistry Experimental Techniques MCQS Online Test

ECAT 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.
Test Helpful For:	ECAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

ECAT Chemistry Experimental Techniques Test

Please wait...

Page 1 of 3

Chemistry

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

Avoided

Crystallization does not involve heating

Depends on temperature

Needed

2. Solvent extraction method is used for compounds which are

Thermally unstable

None

Both A and B

Volatile

3. The technique of chromatography is used in

All

Isolation

Purification

Separation

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

It keeps the stem of funnel full of liquid

It is used to separate organic compounds from water

A solid compound is purified

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

5. CaC1₂ ad P₂O₅ are used as

Deleting agents

Reside agents

Crystallizing agents

Drying agents

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

Crystallization

Chromatography

Solvent extraction

Filtration

7. Sintered glass crucible is used for

Separation of two miscible liquids

Purification of slid

To avoid premature crystallization of solute

Convenient filtration than that by Gooch crucible

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

NaC1

KBr

KC1

9. One of the following does not sublime

Iodine

Wax

Naphthalene

NH₄Cl

10. The most common example of solvent extraction is

Acetone

Ether

Naphthalene

Chloroform

11. The process of filtration is used to

Separate the two immiscible liquids

Separate solute from solution

Separate insoluble particles from liquids

Separate the two miscible liquids

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

Sublimation

Solvent extraction

Chromatography

Filtration

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

Distribution law

Amount of solute used

Law of mass action

Amount of solute

14. During the process of crystallization the hot saturated solution

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

Cooled at a moderate rate to get medium sized crystals

Cooled very slowly to get large sized crystals

Evaporated to get the crystals of the product

15. Which type of chromatography has fixed phase

Absorption

Gas

Partition

None of these

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

Condensation

Crystallization

Separation

Filtration

17. A process controlled by distribution law is

Crystallization

Sublimation

Solvent extraction

Filtration

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

Nature of precipitate

Nature of filter paper

Nature of reaction

Nature of reactants

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

Sand and Nacl

Nacl and Kcl

Sand and naphthalene

Sand and broken pieces of glass

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

Fine filter paper

Ordinary filter paper

Fluted filter

Under suction crucible

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

Carbon tetrachloride

Ethanol

Acetic acid

Chloroform

22. 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

23. After filtration slow cooling yields

Smaller & pure

Bigger & impure crystals

Bigger & pure crystals

Smaller & impure

24. Sintered crucible is made up of

Filer

Plastic

Glass

Porcelain

25. Iodine-salt mixture can be separated through

Simple filtration

Sublimation

Simple distillation

Fractional distillation

Page 2 of 3

26. Chromatography is important in

Quantitative analysis

Qualitative analysis

All of these

Determination of purity

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

Accurate

Difficult

Time consuming

Fast

28. Examples of sublimate does not include

Iodine

Ammonium salts

Nitrates

Naphthalene

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

High solubility

Low temperature

High concentration

High ignition temperature

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

Mud

Crystal

Steel

Residue

31. 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

32. Paper chromatography is a type

None

Partition chromatography

Adsorption chromatography

Absorption chromatography

33. Safe and reliable method of drying crystal in through

Pressing it between folds of filter paper

Evaporation of solution

Vacuum desiccator

Drying it in oven

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

Absorption chromatography

None

Adsorption chromatography

Partition chromatography

35. The dried paper containing pattern on paper is called

Chromatograph

Chromophore

Chromatogram

Chrome

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

Decomposition

Crystallization

Sublimation

Evaporation

37. Condensed solid produced during sublimation is

Residue

Insoluble

Sublimate

Crystal

38. 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

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

Size of the chromatographic tank used

Temperature of the experiment

The size of paper used

Rf values of solutes

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

Filter paper

None

Oven

Desicator

41. Gooch crucible is used to filter the solution of

Under suction crucible

K2Cr2O7

KMnO4

KOH

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

Should be safe to use

Impurities should crystallize along with the solute

Should be expensive

It should react chemically with the solute

43. 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 covers the funnel up to its circumference

If the paper fits tightly

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

Decomposing

Condensing

Melting

Sublimation

45. Which one is not the drying agent

Cacl₂

CaOCl

Phosphorus penta-oxide

Silica gel

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

Formation of solution and evaporation

Sublimation

Chromatography

Formation of solution and filtration

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

Measurement

Calculation

Identification

Separation

48. The crystals are drying through a

Vacuum pump

Vacuum desiccator

Direct providing heat

None

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

Base line

Chromatogram

Solvent front

Event

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

Their Rf values

The size of paper used

Used

Their partition coefficients

Page 3 of 3

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

Solvent extraction

Sublimation

Filtration

Boiling

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

Thermostat

Wire gauze

Ice bath

Water bath

53. 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

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

Distribution coefficients

Law of specific proportion

Distribution law

Law of partial pressure

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

Chromatography

Sublimation

Filtration

Crystallization

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

80⁰

60⁰

90⁰

180⁰

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

The stem of the funnel should be small

The filter paper should be small

The tip of funnel should not touch the beaker

The stem of the funnel should remain continuously full of liquids

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

Distribution coefficient

Boiling point of solvent

Low partial pressures

Distribution law

59. The conversion of vapors directly into solid is called

Condensation

Sublimation

None

Freezing

60. 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

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

UET Peshawar Entry Test 2025 Registration Online ETEA Test D...
ECAT Statistics Test Set 17
ECAT Statistics Test Set 16
ECAT Statistics Test Set 15
ECAT Statistics Test Set 14
ECAT Statistics Test Set 13
ECAT Statistics Test Set 12
ECAT Statistics Test Set 11
ECAT Statistics Test Set 10
ECAT Statistics Test Set 9

Maan AliLast Updated: April 19, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

ECAT Chemistry Experimental Techniques Test Online

Chemistry Experimental Techniques MCQS Online Test

ECAT Chemistry Experimental Techniques Chapter Online Test

ECAT Chemistry Experimental Techniques Test

Chemistry

You Might Also Like

Maan Ali

Leave a Reply Cancel reply

Chemistry Experimental Techniques MCQS Online Test

ECAT Chemistry Experimental Techniques Chapter Online Test

ECAT Chemistry Experimental Techniques Test

Chemistry

You Might Also Like

Maan Ali

Your Related

ECAT Statistics Test Set 15

ECAT Chemistry Atomic Structure Online Test

ECAT Computer Science Basics Concepts and Terminology of Databases Test Online

ECAT Statistics Test Set 9

ECAT English Antonyms 3 Online Test

ECAT Computer Science Data Integrity and Normalization Test Online

Leave a Reply Cancel reply