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

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Question 1 of 20

Chemistry

1. The general formula of alkane is

1.CnH₂n

2.CnH₂

3.CnHn

4.CnH₂n₊₂

Question 1 of 20

Question 2 of 20

2. 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.Stereoisomerism

2.Position isomer

3.Identical

4.Structural

Question 2 of 20

Question 3 of 20

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

1.Combustion

2.Catalytic hydrogenation

3.Polymerization

4.Reaction of cold diluted alkaline KMnO₄

Question 3 of 20

Question 4 of 20

4. Sodalime is:

1.CaO and NaOH

2.Mixture of Na & Ca hydroxide

3.KOH

4.NaOH

Question 4 of 20

Question 5 of 20

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

1.109.5°

2.100°

3.120°

4.180°

Question 5 of 20

Question 6 of 20

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

1.Dealkylation

2.Aromatization

3.Rearrangement

4.Isomerization

Question 6 of 20

Question 7 of 20

7. Ethanol and dimethyl ether are best considered.

1.Stereoisomers

2.Diastereomers

3.Enantiomers

4.Structural isomers

Question 7 of 20

Question 8 of 20

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

1.HNO₃

2.AlCl₃

3.BeCl₃

4.NaCl

Question 8 of 20

Question 9 of 20

9. Acidic hydrogen is present:

1.Benzene

2.Ethene

3.Ethane

4.Acetylene

Question 9 of 20

Question 10 of 20

10. Shao of benzene molecule is:

1.Pyramidal

2.Linear planer

3.Hyxagonal planer

4.Trigonal

Question 10 of 20

Question 11 of 20

11. A molecule is said to be chiral:

1.If it cannot be superimposed to its mirror image

2.If it can be superimposed on its mirror image

3.If is contains plane of symmetry

4.If it contains center of symmetry

Question 11 of 20

Question 12 of 20

12. Alkanes show geo-metrical isomers due to:

1.Rotation around a single bond

2.Restricted rotation around a double bond

3.Resonance

4.Asymmetry

Question 12 of 20

Question 13 of 20

13. The geometry of acetylene is,

1.Angular

2.Linear

3.Trigonal

4.Bent

Question 13 of 20

Question 14 of 20

14. The molecule of ethane posses which hybridization:

1.Sp²

2.sp²d

3.Sp³

4.SP

Question 14 of 20

Question 15 of 20

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

1.Naphtalene

2.Diphenyl methane

3.Anthracene

4.Phenanthrene

Question 15 of 20

Question 16 of 20

16. The electrophile in aromatic sulphonation is:

1.HSO⁻₄

2.SO⁻₄

3.H₂SO₄

4.SO₃

Question 16 of 20

Question 17 of 20

17. The isomers of a substance must have:

1.Same structural formula

2.Same functional groups

3.Same chemical properties

4.Same molecular weight

Question 17 of 20

Question 18 of 20

18. The benzene molecule contains:

1.Delocalized

2.Three double bonds

3.One double bond

4.Two double bonds

Question 18 of 20

Question 19 of 20

19. The marsh gas is:

1.Ethane

2.Methane

3.Propane

4.Butane

Question 19 of 20

Question 20 of 20

20. Benzene cannot undergo:

1.Subsitution

2.Addition

3.Oxidation

4.Elimination

Question 20 of 20

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