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

normal-alkane

iso-alkane

branched-alkane

neo-alkane

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

Hydrolysis of alkyl magnesium bromide

Catalytic hydrogenation of alkanes

Wurtz reaction

Dehydrohalogenation of an alkyl halide

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

Butane

Ethene

Hexane

Ethane

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

Baeyer’s reagent

Stadler’s reagent

Lindler’s reagent

Siemen’s reagent

5. Hydrocarbon which is liquid at room temperature is:

Ethane

Propane

Butane

Pentane

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

Polyethylene

Benzene

None of these

Polyacetylene

7. Calcium carbide reacts with water to produce

Ethane

None of above

Acetylene

Nil

8. Marsh gas was the name given to

Propane

Ethane

Butane

Methane

9. Alkenes and alkynes are

Saturated aliphatic hydrocarbons

None of these

Unsaturated aliphatic hydrocarbons

Unsaturated aromatic hydrocarbons

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

Ethyl chloride

Ethanol

Ethylene

Ethane

11. General formula of alkyne is

CnH2n

CnH2n – 2

CnH2n + 2

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

Lead tetrachloride

Lead acetate

Ethyl acetate

Tetraethyl lead

13. How can you prepare methane from carboxylic acid

By grignard’s reagent

Kolp’s electrolytic method

It is possible with all of the above

By decarbxylic of monocarboxylic acid

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

Polyethylene

None of these

Benzene

Polyacetylene

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

Ethylene

n-haxane

Isobutene

Butane

16. Acetylene gives

Red ppt. with both

White ppt. with both

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

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

17. 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

Sabatier – Sendrens reaction

Cannizaro’s reaction

Kolbes reaction

Haloform reaction

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

Colourless

Blue

Red

Green

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

Alkanes

Alkenes

Alkynes

None of these

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

Discharged

Nil

None of these

Charge

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

Aldehydes, ketones, amines

Alcohols, carboxylic acids, ethers

Carboxylic acids, aldehydes, ketones

Alkanes, alkenes, alkynes

22. Which of the following will be acidic

Propyne

1-butyne

Ethyne

All of these

23. Octane number is zero for

n-Heptane

n-Hexane

Isoheptane

Isooctane

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

Polyethylene

Polyalcohol

Polypropylene

Polylienzene

25. Which is the composition of Lindler’s Catalyst

Pd + SO₂

Pd and CO₂

Pd(BaSO₄) poison with Quinoline

Pd deactivated with sulphur compound

Page 2 of 3

26. Reactivity due to pi-electrons is present in

Alkane

Alkene

Both b & c

Alkyne

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

1830

1892

1947

1979

28. Alkanes are also known as

Unsaturated hydrocarbon

Paraffins

Saturated hydrocarbon

Both a and c

29. Acetylene is used in the manufacture of

All above

Ethyl alcohol

Plastic

Rubber

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

2-bromobuten

Bromu butane

Bromo butane

Cannot be predicted

31. The reaction

is known as

Wolf Kishner reaction

Wurt’z reaction

Kolb’s reaction

Sabalier’s Senderen reaction

32. A salt producing hydrocarbon among these compounds is

Methane

Ethyne

Ethane

Ethene

33. Which is used for artificial ripening of fruit?

Ethane

Methane

Ethene

Ethyne

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

Hydration

Dehydrohalogenation

Hydrohalogenation

Halogenation

35. Alkenes combines readily with electrophilic reagents such as halogens

Haloalkanes

Vinyl halide

Gem dihalides

Vicinal dihalides

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

Vinyl beromide

1-dibromocthene

1, 2 dibromoethane

Bromoethane

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

Aldehyde

Alkene

Alkyl

Saturated hydrocarbon

38. Hydrogenolysis results in the formation of

Alkane

Aldehydes

Alkene

Alkyne

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

Ether

Alcohol

Ethane

Ketone

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

Combustion

Polymerization

Reaction of Cold dilute alkaline KMnO₄

Catalytic hydrogenation

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

Any product

Bromonium ion

Halohydrin

Vicinal dihalide

42. 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

43. Acetylene on reacting with ammonical silver nitrate gives

Silver acetate

Silver acetylide

Silver mirror

Silver metal

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

Polymerization

Hybridization

None of these

Isomerization

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

Aqueous alkaline KMnO₄

Cl₂ dissolved in CCl₄

Conc. H₂SO₄

Ammonical Cu₂Cl₂

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

Alkene

Alcohol

Carboxylic acid

Alkyne

47. Vicinal dihalides on treatment with zinc dust gives

All above

Alkynes

Alkanes

Alkenes

48. Paraffins are also called

Alkanes

Alkynes

Alkenes

None of these

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

Ethyl alcohol

Carboxylic acid

Ethyl chloride

None of these

50. Which of the following is Bayer’s reagent

Alkaline KMnO₄

Acidic KMnO₄

aqBr₂ water

Neutral permanganate

Page 3 of 3

51. Alkyl halides undergo dehydrohalogenation by reaction with

KOHaq

KOHalc

Al₂O₃

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

F2 > Br2 > Cl2

Cl2 > Br2 > F2

Br2 > Cl2 > F2

Cl2 > Cl2 > Br2

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

CH₄

C₂H₆

C₂H₂

C₂H₄

54. Mustard gas has a formula

S (CH₂)₂ Cl₂

S (CH₃)₃ Cl₂

S (CH₂)₄ Cl₂

S (CH₂)₃Cl

55. Which of the following is the most reactive

Ethane

Ethene

Ethyne

Benzene

56. Ethene is slightly ________ in taste

Tasteless

Bitter

None of these

Sweet

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

By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

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

Acetylene

Ethene

Benzene

Ethanoic acid

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

Vinyl alcohol

Acetaldehyde

Acetone

Formaldehyde

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

CH₃COOCH₃

CH₃CHO

CH₃COCH₃

CH₃CH₂CH

61. Ethylene is a __________ molecule

Nonpolar

Nil

Polar

None of these

62. Alkenes are produced from dehalogenation of

Vicinal trihalo alkane

Trihalo alkane

Dihalo alkane

Vicinal dihalo alkane

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

Alkynes

Alcohol

Alkanes

Alkenes

64. Vinyl acetylene combines with HCl to form

Benzene

Polyacetylene

Divinylacetylene

Chloroprene

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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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Chemistry Aliphatic Hydrocarbons MCQS Online Test

ECAT Chemistry Aliphatic Hydrocarbons Chapter Online Test

ECAT Chemistry Aliphatic Hydrocarbons Test

Chemistry

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