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

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Question 1 of 20

Chemistry

1. The isomers of a substance must have:

1.Same functional groups

2.Same structural formula

3.Same chemical properties

4.Same molecular weight

Question 1 of 20

Question 2 of 20

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

1.Reaction of cold diluted alkaline KMnO₄

2.Polymerization

3.Catalytic hydrogenation

4.Combustion

Question 2 of 20

Question 3 of 20

3. Ethanol and dimethyl ether are best considered.

1.Structural isomers

2.Diastereomers

3.Enantiomers

4.Stereoisomers

Question 3 of 20

Question 4 of 20

4. The general formula of alkane is

1.CnH₂n

2.CnHn

3.CnH₂

4.CnH₂n₊₂

Question 4 of 20

Question 5 of 20

5. 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.Structural

3.Position isomer

4.Identical

Question 5 of 20

Question 6 of 20

6. Benzene cannot undergo:

1.Oxidation

2.Elimination

3.Addition

4.Subsitution

Question 6 of 20

Question 7 of 20

7. The molecule of ethane posses which hybridization:

1.sp²d

2.Sp²

3.SP

4.Sp³

Question 7 of 20

Question 8 of 20

8. Alkanes show geo-metrical isomers due to:

1.Rotation around a single bond

2.Asymmetry

3.Resonance

4.Restricted rotation around a double bond

Question 8 of 20

Question 9 of 20

9. A molecule is said to be chiral:

1.If it cannot be superimposed to its mirror image

2.If is contains plane of symmetry

3.If it can be superimposed on its mirror image

4.If it contains center of symmetry

Question 9 of 20

Question 10 of 20

10. Sodalime is:

1.CaO and NaOH

2.NaOH

3.KOH

4.Mixture of Na & Ca hydroxide

Question 10 of 20

Question 11 of 20

11. Acidic hydrogen is present:

1.Ethane

2.Benzene

3.Ethene

4.Acetylene

Question 11 of 20

Question 12 of 20

12. The marsh gas is:

1.Propane

2.Methane

3.Ethane

4.Butane

Question 12 of 20

Question 13 of 20

13. The geometry of acetylene is,

1.Linear

2.Bent

3.Trigonal

4.Angular

Question 13 of 20

Question 14 of 20

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

1.NaCl

2.BeCl₃

3.AlCl₃

4.HNO₃

Question 14 of 20

Question 15 of 20

15. The benzene molecule contains:

1.Delocalized

2.Three double bonds

3.Two double bonds

4.One double bond

Question 15 of 20

Question 16 of 20

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

1.Phenanthrene

2.Diphenyl methane

3.Anthracene

4.Naphtalene

Question 16 of 20

Question 17 of 20

17. Shao of benzene molecule is:

1.Linear planer

2.Hyxagonal planer

3.Pyramidal

4.Trigonal

Question 17 of 20

Question 18 of 20

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

1.180°

2.120°

3.109.5°

4.100°

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.Dealkylation

2.Isomerization

3.Aromatization

4.Rearrangement

Question 19 of 20

Question 20 of 20

20. The electrophile in aromatic sulphonation is:

1.SO⁻₄

2.H₂SO₄

3.HSO⁻₄

4.SO₃

Question 20 of 20

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