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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. Alkyl halides undergo dehydrohalogenation by reaction with

KOHaq

Al₂O₃

KOHalc

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

Ethane

Ether

Ketone

Alcohol

3. Acetylene is used in the manufacture of

Rubber

All above

Ethyl alcohol

Plastic

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

Polyethylene

Polyacetylene

Benzene

None of these

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

Siemen’s reagent

Stadler’s reagent

Lindler’s reagent

Baeyer’s reagent

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

Halohydrin

Vicinal dihalide

Bromonium ion

Any product

7. Which is the composition of Lindler’s Catalyst

Pd deactivated with sulphur compound

Pd + SO₂

Pd(BaSO₄) poison with Quinoline

Pd and CO₂

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

Benzene

Polyethylene

None of these

Polyacetylene

9. A salt producing hydrocarbon among these compounds is

Ethene

Ethane

Ethyne

Methane

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

Tetraethyl lead

Lead tetrachloride

Ethyl acetate

Lead acetate

11. Reactivity due to pi-electrons is present in

Alkane

Alkene

Alkyne

Both b & c

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

neo-alkane

normal-alkane

iso-alkane

branched-alkane

13. Paraffins are also called

Alkenes

Alkanes

None of these

Alkynes

14. The reaction

is known as

Wolf Kishner reaction

Wurt’z reaction

Sabalier’s Senderen reaction

Kolb’s reaction

15. Calcium carbide reacts with water to produce

Ethane

None of above

Nil

Acetylene

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

2-bromobuten

Bromo butane

Cannot be predicted

Bromu butane

17. Marsh gas was the name given to

Butane

Methane

Propane

Ethane

18. Vinyl acetylene combines with HCl to form

Chloroprene

Polyacetylene

Benzene

Divinylacetylene

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

Catalytic hydrogenation

Reaction of Cold dilute alkaline KMnO₄

Combustion

Polymerization

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

Acetaldehyde

Acetone

Formaldehyde

Vinyl alcohol

21. Alkenes combines readily with electrophilic reagents such as halogens

Gem dihalides

Vicinal dihalides

Vinyl halide

Haloalkanes

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

Ethanoic acid

Benzene

Ethene

Acetylene

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

Alkene

Alcohol

Carboxylic acid

Alkyne

24. Alkenes and alkynes are

Unsaturated aliphatic hydrocarbons

None of these

Saturated aliphatic hydrocarbons

Unsaturated aromatic hydrocarbons

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

Cl2 > Cl2 > Br2

F2 > Br2 > Cl2

Br2 > Cl2 > F2

Cl2 > Br2 > F2

Page 2 of 3

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

None of these

Hybridization

Polymerization

Isomerization

27. How can you prepare methane from carboxylic acid

By decarbxylic of monocarboxylic acid

By grignard’s reagent

Kolp’s electrolytic method

It is possible with all of the above

28. Ethylene is a __________ molecule

Polar

Nonpolar

Nil

None of these

29. Hydrocarbon which is liquid at room temperature is:

Butane

Pentane

Propane

Ethane

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

Ethane

Ethanol

Ethylene

Ethyl chloride

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

1979

1892

1947

1830

32. Which of the following is Bayer’s reagent

Neutral permanganate

Alkaline KMnO₄

Acidic KMnO₄

aqBr₂ water

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

C₂H₄

C₂H₂

C₂H₆

CH₄

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

CH₃COOCH₃

CH₃COCH₃

CH₃CH₂CH

CH₃CHO

35. Hydrogenolysis results in the formation of

Alkene

Aldehydes

Alkyne

Alkane

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

Alcohols, carboxylic acids, ethers

Alkanes, alkenes, alkynes

Aldehydes, ketones, amines

Carboxylic acids, aldehydes, ketones

37. Octane number is zero for

n-Heptane

n-Hexane

Isooctane

Isoheptane

38. Alkenes are produced from dehalogenation of

Trihalo alkane

Vicinal dihalo alkane

Dihalo alkane

Vicinal trihalo alkane

39. General formula of alkyne is

CnH2n

CnH2n – 2

CnH2n + 2

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

Polypropylene

Polyethylene

Polyalcohol

Polylienzene

41. Ethene is slightly ________ in taste

Bitter

Sweet

None of these

Tasteless

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

Alcohol

Alkynes

Alkanes

Alkenes

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

Butane

Ethene

Ethane

Hexane

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

Saturated hydrocarbon

Alkyl

Aldehyde

Alkene

45. 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

46. 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

47. Alkanes are also known as

Paraffins

Unsaturated hydrocarbon

Both a and c

Saturated hydrocarbon

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

Ethyl alcohol

None of these

Carboxylic acid

Ethyl chloride

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

Hydration

Hydrohalogenation

Halogenation

Dehydrohalogenation

50. Acetylene on reacting with ammonical silver nitrate gives

Silver acetate

Silver mirror

Silver acetylide

Silver metal

Page 3 of 3

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

n-haxane

Isobutene

Ethylene

Butane

52. Which of the following is the most reactive

Ethane

Benzene

Ethene

Ethyne

53. Mustard gas has a formula

S (CH₂)₂ Cl₂

S (CH₂)₃Cl

S (CH₂)₄ Cl₂

S (CH₃)₃ Cl₂

54. Which is used for artificial ripening of fruit?

Ethene

Methane

Ethyne

Ethane

55. 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

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

Charge

Nil

Discharged

None of these

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

None of these

Alkenes

Alkanes

Alkynes

58. Vicinal dihalides on treatment with zinc dust gives

Alkynes

Alkenes

Alkanes

All above

59. Which of the following will be acidic

Propyne

Ethyne

All of these

1-butyne

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

By reduction of CH2CL2

Wurtz reaction

None of these

Liquification of natural gas

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

Dehydrohalogenation of an alkyl halide

Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

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

Cl₂ dissolved in CCl₄

Ammonical Cu₂Cl₂

Conc. H₂SO₄

Aqueous alkaline KMnO₄

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

Vinyl beromide

Bromoethane

1, 2 dibromoethane

1-dibromocthene

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

Green

Colourless

Blue

Red

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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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