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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. 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

2. Which of the following is Bayer’s reagent

aqBr₂ water

Neutral permanganate

Alkaline KMnO₄

Acidic KMnO₄

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

Liquification of natural gas

Wurtz reaction

None of these

By reduction of CH2CL2

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

Alkenes

Alkynes

Alcohol

Alkanes

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

Nil

Discharged

Charge

None of these

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

Bromoethane

1, 2 dibromoethane

Vinyl beromide

1-dibromocthene

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

Vinyl alcohol

Formaldehyde

Acetone

Acetaldehyde

8. 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

Haloform reaction

Sabatier – Sendrens reaction

Cannizaro’s reaction

Kolbes reaction

9. Alkenes combines readily with electrophilic reagents such as halogens

Haloalkanes

Gem dihalides

Vicinal dihalides

Vinyl halide

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

Ethylene

Isobutene

n-haxane

Butane

11. Vicinal dihalides on treatment with zinc dust gives

Alkynes

Alkanes

All above

Alkenes

12. Alkanes are also known as

Saturated hydrocarbon

Both a and c

Unsaturated hydrocarbon

Paraffins

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

Catalytic hydrogenation

Combustion

Polymerization

Reaction of Cold dilute alkaline KMnO₄

14. Octane number is zero for

n-Heptane

Isoheptane

Isooctane

n-Hexane

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

Red

Colourless

Green

Blue

16. Alkenes and alkynes are

Unsaturated aromatic hydrocarbons

None of these

Saturated aliphatic hydrocarbons

Unsaturated aliphatic hydrocarbons

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

Isomerization

Polymerization

None of these

Hybridization

18. 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

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

Hexane

Ethane

Butane

Ethene

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

CH₃COOCH₃

CH₃COCH₃

CH₃CH₂CH

CH₃CHO

21. Which of the following will be acidic

Propyne

1-butyne

Ethyne

All of these

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

Aldehydes, ketones, amines

Carboxylic acids, aldehydes, ketones

Alkanes, alkenes, alkynes

Alcohols, carboxylic acids, ethers

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

1947

1979

1892

1830

24. Ethene is slightly ________ in taste

None of these

Tasteless

Sweet

Bitter

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

Polyethylene

Polyalcohol

Polylienzene

Polypropylene

Page 2 of 3

26. 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

27. Reactivity due to pi-electrons is present in

Alkene

Both b & c

Alkyne

Alkane

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

Br2 > Cl2 > F2

Cl2 > Br2 > F2

Cl2 > Cl2 > Br2

F2 > Br2 > Cl2

29. General formula of alkyne is

CnH2n

CnH2n + 2

CnH2n – 2

30. Hydrocarbon which is liquid at room temperature is:

Butane

Pentane

Ethane

Propane

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

Bromu butane

Bromo butane

2-bromobuten

Cannot be predicted

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

Alcohol

Ether

Ketone

Ethane

33. Calcium carbide reacts with water to produce

None of above

Acetylene

Ethane

Nil

34. Hydrogenolysis results in the formation of

Alkyne

Aldehydes

Alkene

Alkane

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

Ethane

Ethyl chloride

Ethanol

Ethylene

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

Saturated hydrocarbon

Alkene

Alkyl

Aldehyde

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

Polyacetylene

Polyethylene

None of these

Benzene

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

Hydration

Dehydrohalogenation

Hydrohalogenation

Halogenation

39. Acetylene is used in the manufacture of

Rubber

Ethyl alcohol

Plastic

All above

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

None of these

Polyacetylene

Benzene

Polyethylene

41. Marsh gas was the name given to

Ethane

Propane

Butane

Methane

42. Mustard gas has a formula

S (CH₂)₃Cl

S (CH₂)₂ Cl₂

S (CH₃)₃ Cl₂

S (CH₂)₄ Cl₂

43. Acetylene on reacting with ammonical silver nitrate gives

Silver acetylide

Silver acetate

Silver mirror

Silver metal

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

Alkanes

Alkynes

Alkenes

None of these

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

Alkene

Alcohol

Carboxylic acid

Alkyne

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

C₂H₂

C₂H₆

C₂H₄

CH₄

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

Cl₂ dissolved in CCl₄

Aqueous alkaline KMnO₄

Conc. H₂SO₄

Ammonical Cu₂Cl₂

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

neo-alkane

normal-alkane

iso-alkane

branched-alkane

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

Halohydrin

Vicinal dihalide

Any product

Bromonium ion

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

Acetylene

Ethanoic acid

Ethene

Benzene

Page 3 of 3

51. Vinyl acetylene combines with HCl to form

Benzene

Polyacetylene

Chloroprene

Divinylacetylene

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

Stadler’s reagent

Baeyer’s reagent

Siemen’s reagent

Lindler’s reagent

53. The reaction

is known as

Sabalier’s Senderen reaction

Wolf Kishner reaction

Kolb’s reaction

Wurt’z reaction

54. Which is the composition of Lindler’s Catalyst

Pd and CO₂

Pd deactivated with sulphur compound

Pd(BaSO₄) poison with Quinoline

Pd + SO₂

55. Alkyl halides undergo dehydrohalogenation by reaction with

Al₂O₃

KOHalc

KOHaq

56. How can you prepare methane from carboxylic acid

Kolp’s electrolytic method

It is possible with all of the above

By decarbxylic of monocarboxylic acid

By grignard’s reagent

57. Ethylene is a __________ molecule

None of these

Polar

Nonpolar

Nil

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

Tetraethyl lead

Lead tetrachloride

Ethyl acetate

Lead acetate

59. Which of the following is the most reactive

Ethyne

Ethene

Ethane

Benzene

60. Which is used for artificial ripening of fruit?

Ethane

Ethyne

Ethene

Methane

61. A salt producing hydrocarbon among these compounds is

Methane

Ethene

Ethyne

Ethane

62. Alkenes are produced from dehalogenation of

Trihalo alkane

Vicinal trihalo alkane

Dihalo alkane

Vicinal dihalo alkane

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

Ethyl chloride

Ethyl alcohol

None of these

Carboxylic acid

64. Paraffins are also called

None of these

Alkanes

Alkenes

Alkynes

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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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