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ECAT Chemistry Aliphatic Hydrocarbons Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry Aliphatic Hydrocarbons MCQS Online Test

ECAT Chemistry Aliphatic Hydrocarbons Chapter Online Test

Total Questions:	64
Time Allowed:	30 Minutes
Total Marks:	64
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Aliphatic Hydrocarbons Test

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Page 1 of 3

Chemistry

1. Which of the following is the most reactive

Ethene

Benzene

Ethyne

Ethane

2. Which of the following Compounds will form a hydrocarbon on reaction with Grignard’s reagent?

CH₃COCH₃

CH₃CH₂CH

CH₃CHO

CH₃COOCH₃

3. Calcium carbide reacts with water to produce

Nil

Acetylene

Ethane

None of above

4. Which of the following will be acidic

Ethyne

Propyne

1-butyne

All of these

5. Alkenes and alkynes are

Unsaturated aromatic hydrocarbons

Saturated aliphatic hydrocarbons

None of these

Unsaturated aliphatic hydrocarbons

6. Ethylene hydrogen sulphate is obtained by reaction of H₂SO₄ with?

Ethylene

Ethane

Ethanol

Ethyl chloride

7. A compound of carbons and hydrogen used in welding is

CH₄

C₂H₆

C₂H₄

C₂H₂

8. A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4-trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is

100

9. What test can be used to test presence of unsaturation is alkenes?

Stadler’s reagent

Lindler’s reagent

Siemen’s reagent

Baeyer’s reagent

10. Vicinal dihalides on treatment with zinc dust gives

Alkenes

All above

Alkynes

Alkanes

11. Ethylene polymerizes at 100 atm pressure at 400°C give

Polypropylene

Polyalcohol

Polyethylene

Polylienzene

12. Acetylene is used in the manufacture of

All above

Plastic

Ethyl alcohol

Rubber

13. When HBr is added to ethyne the product would be

1, 2 dibromoethane

Bromoethane

1-dibromocthene

Vinyl beromide

14. Which is used for artificial ripening of fruit?

Ethene

Ethane

Ethyne

Methane

15. Which one of the following reagent distinguishing ethylene from acetylene?

Ammonical Cu₂Cl₂

Cl₂ dissolved in CCl₄

Conc. H₂SO₄

Aqueous alkaline KMnO₄

16. Hydrocarbon which is liquid at room temperature is:

Ethane

Propane

Pentane

Butane

17. How can you prepare methane from carboxylic acid

By grignard’s reagent

It is possible with all of the above

Kolp’s electrolytic method

By decarbxylic of monocarboxylic acid

18. Which of the following hydrocarbons is liquid at room temperature?

Hexane

Ethene

Ethane

Butane

19. Kolb’s electrolysis of sod. Salt of butanoic acid gives

n-haxane

Butane

Isobutene

Ethylene

20. The elimination of HX from adjacent carbon atoms is called

Halogenation

Hydration

Dehydrohalogenation

Hydrohalogenation

21. Alkenes ________ the colour of basic solution of KMnO4.

None of these

Charge

Discharged

Nil

22. When water is added to ethylene what would be the product

Vinyl alcohol

Acetone

Acetaldehyde

Formaldehyde

23. When one hydrogen atom of alkane is removed then it is called

Alkyl

Saturated hydrocarbon

Alkene

Aldehyde

24. Alkanes are also known as

Paraffins

Unsaturated hydrocarbon

Saturated hydrocarbon

Both a and c

25. Vinyl acetylene combines with HCl to form

Polyacetylene

Divinylacetylene

Chloroprene

Benzene

Page 2 of 3

26. Which of the following all contain a carbonyl group?

Alcohols, carboxylic acids, ethers

Carboxylic acids, aldehydes, ketones

Aldehydes, ketones, amines

Alkanes, alkenes, alkynes

27. Hydrogenation of alkenes/alkynes in the presence of Ni as catalyst at 300°C results in the formation of corresponding alkanes. This reaction is known as

Cannizaro’s reaction

Sabatier – Sendrens reaction

Haloform reaction

Kolbes reaction

28. The order of reactivity of halogens in aliphatic substitution reactions is

F2 > Br2 > Cl2

Br2 > Cl2 > F2

Cl2 > Br2 > F2

Cl2 > Cl2 > Br2

29. When HBr is added to 1-butene what would be the product

Cannot be predicted

2-bromobuten

Bromu butane

Bromo butane

30. When acetylene is passed through a copper but at 300°C, it polymerizes to:

Polyacetylene

Benzene

Polyethylene

None of these

31. Which of the following method is most appropriate for the manufacture of methane?

Liquification of natural gas

None of these

Wurtz reaction

By reduction of CH2CL2

32. Marsh gas was the name given to

Ethane

Butane

Propane

Methane

33. The reaction

is known as

Wurt’z reaction

Wolf Kishner reaction

Kolb’s reaction

Sabalier’s Senderen reaction

34. The reaction/method that does not give an alkane is

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Catalytic hydrogenation of alkanes

Dehydrohalogenation of an alkyl halide

35. Ethylene combines with water in the presence of H₂SO₄ + HgSO₄ and forms

Carboxylic acid

Ethyl alcohol

Ethyl chloride

None of these

36. Metallic ethynides are formed by the reaction of ___________ with ammonical silver nitrate or ammonical cuprous chloride

Ethene

Benzene

Acetylene

Ethanoic acid

37. Alkyl halides undergo dehydrohalogenation by reaction with

KOHaq

KOHalc

Al₂O₃

38. Acetylene on reacting with ammonical silver nitrate gives

Silver mirror

Silver acetate

Silver metal

Silver acetylide

39. Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCl, are converted to

Alkenes

Alkynes

Alkanes

Alcohol

40. Alkenes are produced from dehalogenation of

Trihalo alkane

Vicinal dihalo alkane

Dihalo alkane

Vicinal trihalo alkane

41. “Each different compound should have a different name” was published by IUPAC system of nomenclature in

1892

1830

1979

1947

42. Reactivity due to pi-electrons is present in

Alkyne

Alkene

Alkane

Both b & c

43. General formula of alkyne is

CnH2n – 2

CnH2n + 2

CnH2n

44. Which of the following substances is used as an antiknock compound?

Lead acetate

Ethyl acetate

Tetraethyl lead

Lead tetrachloride

45. Which of the following is Bayer’s reagent

Neutral permanganate

Alkaline KMnO₄

Acidic KMnO₄

aqBr₂ water

46. Alkenes combines readily with electrophilic reagents such as halogens

Vinyl halide

Vicinal dihalides

Gem dihalides

Haloalkanes

47. Which is the composition of Lindler’s Catalyst

Pd(BaSO₄) poison with Quinoline

Pd deactivated with sulphur compound

Pd and CO₂

Pd + SO₂

48. When ethane is passed through a dilute solution of KMnO₄, the pink colour changes to

Green

Red

Blue

Colourless

49. Mustard gas has a formula

S (CH₂)₃Cl

S (CH₃)₃ Cl₂

S (CH₂)₄ Cl₂

S (CH₂)₂ Cl₂

50. Ethylene is a __________ molecule

None of these

Nonpolar

Nil

Polar

Page 3 of 3

51. To what Organic Family does the following molecule belong? CH₂=CH–CH₃

Alcohol

Carboxylic acid

Alkene

Alkyne

52. Hydrogenolysis results in the formation of

Alkene

Alkane

Aldehydes

Alkyne

53. The hydrocarbon in which all the four valencies of carbon atoms are fully utilized are called ___________

Alkanes

Alkynes

Alkenes

None of these

54. When acetylene is passed through a copper tube at 300°C, it polymerizes to:

None of these

Polyacetylene

Polyethylene

Benzene

55. When H₂SO₄ is heated with excess of ethanol at 140°C, the major product is

Alcohol

Ketone

Ethane

Ether

56. Alkanes containing a methyl group on main chain at 2nd carbon are called

iso-alkane

normal-alkane

branched-alkane

neo-alkane

57. A salt producing hydrocarbon among these compounds is

Ethane

Ethene

Ethyne

Methane

58. Paraffins are also called

Alkynes

Alkenes

Alkanes

None of these

59. When X₂ reacts with alkenes in the presence of water as a solvent, the ultimate product is

Bromonium ion

Vicinal dihalide

Any product

Halohydrin

60. Acetylene gives

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2

White ppt. with both

Red ppt. with both

White ppt. with ammonical AgNo3 and red ppt. with ammonical Cu2Cl2

61. Ethene is slightly ________ in taste

Sweet

Bitter

Tasteless

None of these

62. Octane number is zero for

Isooctane

n-Heptane

n-Hexane

Isoheptane

63. The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

Hybridization

Isomerization

Polymerization

None of these

64. Which reaction is used as test for the presence of alkenes?

Catalytic hydrogenation

Combustion

Reaction of Cold dilute alkaline KMnO₄

Polymerization

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Mustansar KhanLast Updated: April 19, 2025

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ECAT Chemistry Aliphatic Hydrocarbons Test Online

Chemistry Aliphatic Hydrocarbons MCQS Online Test

ECAT Chemistry Aliphatic Hydrocarbons Chapter Online Test

ECAT Chemistry Aliphatic Hydrocarbons Test

Chemistry

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