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

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Question 1 of 20

Chemistry

1. The geometry of acetylene is,

1.Angular

2.Trigonal

3.Linear

4.Bent

Question 1 of 20

Question 2 of 20

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

1.Rearrangement

2.Dealkylation

3.Aromatization

4.Isomerization

Question 2 of 20

Question 3 of 20

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

1.Reaction of cold diluted alkaline KMnO₄

2.Combustion

3.Polymerization

4.Catalytic hydrogenation

Question 3 of 20

Question 4 of 20

4. Alkanes show geo-metrical isomers due to:

1.Rotation around a single bond

2.Resonance

3.Restricted rotation around a double bond

4.Asymmetry

Question 4 of 20

Question 5 of 20

5. Shao of benzene molecule is:

1.Trigonal

2.Pyramidal

3.Linear planer

4.Hyxagonal planer

Question 5 of 20

Question 6 of 20

6. The molecule of ethane posses which hybridization:

1.SP

2.Sp²

3.Sp³

4.sp²d

Question 6 of 20

Question 7 of 20

7. Sodalime is:

1.KOH

2.CaO and NaOH

3.NaOH

4.Mixture of Na & Ca hydroxide

Question 7 of 20

Question 8 of 20

8. A molecule is said to be chiral:

1.If it can be superimposed on its mirror image

2.If it cannot be superimposed to its mirror image

3.If is contains plane of symmetry

4.If it contains center of symmetry

Question 8 of 20

Question 9 of 20

9. Benzene cannot undergo:

1.Elimination

2.Oxidation

3.Subsitution

4.Addition

Question 9 of 20

Question 10 of 20

10. 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.Identical

2.Stereoisomerism

3.Position isomer

4.Structural

Question 10 of 20

Question 11 of 20

11. The general formula of alkane is

1.CnH₂n₊₂

2.CnH₂n

3.CnH₂

4.CnHn

Question 11 of 20

Question 12 of 20

12. The electrophile in aromatic sulphonation is:

1.SO₃

2.HSO⁻₄

3.H₂SO₄

4.SO⁻₄

Question 12 of 20

Question 13 of 20

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

1.Naphtalene

2.Anthracene

3.Diphenyl methane

4.Phenanthrene

Question 13 of 20

Question 14 of 20

14. The isomers of a substance must have:

1.Same functional groups

2.Same molecular weight

3.Same chemical properties

4.Same structural formula

Question 14 of 20

Question 15 of 20

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

1.BeCl₃

2.NaCl

3.AlCl₃

4.HNO₃

Question 15 of 20

Question 16 of 20

16. Ethanol and dimethyl ether are best considered.

1.Diastereomers

2.Enantiomers

3.Stereoisomers

4.Structural isomers

Question 16 of 20

Question 17 of 20

17. The benzene molecule contains:

1.Two double bonds

2.One double bond

3.Three double bonds

4.Delocalized

Question 17 of 20

Question 18 of 20

18. Acidic hydrogen is present:

1.Ethane

2.Acetylene

3.Benzene

4.Ethene

Question 18 of 20

Question 19 of 20

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

1.100°

2.109.5°

3.120°

4.180°

Question 19 of 20

Question 20 of 20

20. The marsh gas is:

1.Methane

2.Propane

3.Butane

4.Ethane

Question 20 of 20

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