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

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Question 1 of 20

Chemistry

1. The molecule of ethane posses which hybridization:

1.Sp³

2.SP

3.Sp²

4.sp²d

Question 1 of 20

Question 2 of 20

2. The marsh gas is:

1.Propane

2.Ethane

3.Butane

4.Methane

Question 2 of 20

Question 3 of 20

3. Alkanes show geo-metrical isomers due to:

1.Restricted rotation around a double bond

2.Resonance

3.Asymmetry

4.Rotation around a single bond

Question 3 of 20

Question 4 of 20

4. Ethanol and dimethyl ether are best considered.

1.Diastereomers

2.Structural isomers

3.Enantiomers

4.Stereoisomers

Question 4 of 20

Question 5 of 20

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

1.Naphtalene

2.Diphenyl methane

3.Anthracene

4.Phenanthrene

Question 5 of 20

Question 6 of 20

6. 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.Identical

3.Structural

4.Position isomer

Question 6 of 20

Question 7 of 20

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

1.100°

2.109.5°

3.180°

4.120°

Question 7 of 20

Question 8 of 20

8. Shao of benzene molecule is:

1.Trigonal

2.Pyramidal

3.Hyxagonal planer

4.Linear planer

Question 8 of 20

Question 9 of 20

9. The electrophile in aromatic sulphonation is:

1.H₂SO₄

2.SO⁻₄

3.HSO⁻₄

4.SO₃

Question 9 of 20

Question 10 of 20

10. The benzene molecule contains:

1.Three double bonds

2.Delocalized

3.One double bond

4.Two double bonds

Question 10 of 20

Question 11 of 20

11. The isomers of a substance must have:

1.Same structural formula

2.Same molecular weight

3.Same chemical properties

4.Same functional groups

Question 11 of 20

Question 12 of 20

12. The general formula of alkane is

1.CnH₂

2.CnHn

3.CnH₂n

4.CnH₂n₊₂

Question 12 of 20

Question 13 of 20

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

1.BeCl₃

2.AlCl₃

3.NaCl

4.HNO₃

Question 13 of 20

Question 14 of 20

14. The geometry of acetylene is,

1.Trigonal

2.Angular

3.Bent

4.Linear

Question 14 of 20

Question 15 of 20

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

1.Dealkylation

2.Rearrangement

3.Aromatization

4.Isomerization

Question 15 of 20

Question 16 of 20

16. Sodalime is:

1.NaOH

2.KOH

3.CaO and NaOH

4.Mixture of Na & Ca hydroxide

Question 16 of 20

Question 17 of 20

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

1.Combustion

2.Polymerization

3.Catalytic hydrogenation

4.Reaction of cold diluted alkaline KMnO₄

Question 17 of 20

Question 18 of 20

18. A molecule is said to be chiral:

1.If is contains plane of symmetry

2.If it cannot be superimposed to its mirror image

3.If it contains center of symmetry

4.If it can be superimposed on its mirror image

Question 18 of 20

Question 19 of 20

19. Benzene cannot undergo:

1.Subsitution

2.Oxidation

3.Elimination

4.Addition

Question 19 of 20

Question 20 of 20

20. Acidic hydrogen is present:

1.Benzene

2.Ethene

3.Acetylene

4.Ethane

Question 20 of 20

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