Punjab 12th Class Chemistry Chapter 8 Aliphatic Hydrocarbons Mcqs Test Online

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Question 1 of 20

Chemistry

1. Alkanes show geo-metrical isomers due to:

1.Resonance

2.Rotation around a single bond

3.Asymmetry

4.Restricted rotation around a double bond

Question 1 of 20

Question 2 of 20

2. Acidic hydrogen is present:

1.Ethene

2.Benzene

3.Ethane

4.Acetylene

Question 2 of 20

Question 3 of 20

3. Two compounds have the same composition and also have the same atoms attached to the same atoms, although with different orientations is space. These compounds are:

1.Position isomer

2.Identical

3.Structural

4.Stereoisomerism

Question 3 of 20

Question 4 of 20

4. The electrophile in aromatic sulphonation is:

1.SO⁻₄

2.HSO⁻₄

3.H₂SO₄

4.SO₃

Question 4 of 20

Question 5 of 20

5. A molecule is said to be chiral:

1.If it contains center of symmetry

2.If it can be superimposed on its mirror image

3.If it cannot be superimposed to its mirror image

4.If is contains plane of symmetry

Question 5 of 20

Question 6 of 20

6. Which reaction is used as test for the presence of alkane:

1.Polymerization

2.Combustion

3.Reaction of cold diluted alkaline KMnO₄

4.Catalytic hydrogenation

Question 6 of 20

Question 7 of 20

7. Sodalime is:

1.Mixture of Na & Ca hydroxide

2.CaO and NaOH

3.KOH

4.NaOH

Question 7 of 20

Question 8 of 20

8. The benzene molecule contains:

1.Three double bonds

2.One double bond

3.Two double bonds

4.Delocalized

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Question 9 of 20

9. The marsh gas is:

1.Methane

2.Propane

3.Butane

4.Ethane

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Question 10 of 20

10. Catalyst used for friedal craft’s reaction is:

1.HNO₃

2.AlCl₃

3.NaCl

4.BeCl₃

Question 10 of 20

Question 11 of 20

11. Shao of benzene molecule is:

1.Hyxagonal planer

2.Pyramidal

3.Linear planer

4.Trigonal

Question 11 of 20

Question 12 of 20

12. The Sp³ hyrid orbitals are oriented in space at one angle.

1.100°

2.120°

3.180°

4.109.5°

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Question 13 of 20

13. The molecule of ethane posses which hybridization:

1.sp²d

2.Sp³

3.Sp²

4.SP

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Question 14 of 20

14. Ethanol and dimethyl ether are best considered.

1.Diastereomers

2.Stereoisomers

3.Structural isomers

4.Enantiomers

Question 14 of 20

Question 15 of 20

15. The isomers of a substance must have:

1.Same structural formula

2.Same functional groups

3.Same chemical properties

4.Same molecular weight

Question 15 of 20

Question 16 of 20

16. Benzene cannot undergo:

1.Addition

2.Oxidation

3.Subsitution

4.Elimination

Question 16 of 20

Question 17 of 20

17. In which one of the following compounds the benzene ring is isolated:

1.Diphenyl methane

2.Naphtalene

3.Anthracene

4.Phenanthrene

Question 17 of 20

Question 18 of 20

18. The general formula of alkane is

1.CnH₂

2.CnH₂n₊₂

3.CnHn

4.CnH₂n

Question 18 of 20

Question 19 of 20

19. The conversion of n – hexane into benzene by heating in the presence of pt is called:

1.Rearrangement

2.Isomerization

3.Dealkylation

4.Aromatization

Question 19 of 20

Question 20 of 20

20. The geometry of acetylene is,

1.Trigonal

2.Angular

3.Linear

4.Bent

Question 20 of 20

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