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.CnHn

2.CnH₂

3.CnH₂n₊₂

4.CnH₂n

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.Position isomer

2.Structural

3.Identical

4.Stereoisomerism

Question 2 of 20

Question 3 of 20

3. The isomers of a substance must have:

1.Same molecular weight

2.Same chemical properties

3.Same structural formula

4.Same functional groups

Question 3 of 20

Question 4 of 20

4. Sodalime is:

1.Mixture of Na & Ca hydroxide

2.KOH

3.CaO and NaOH

4.NaOH

Question 4 of 20

Question 5 of 20

5. Acidic hydrogen is present:

1.Ethene

2.Benzene

3.Acetylene

4.Ethane

Question 5 of 20

Question 6 of 20

6. The benzene molecule contains:

1.Two double bonds

2.Delocalized

3.One double bond

4.Three double bonds

Question 6 of 20

Question 7 of 20

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

1.BeCl₃

2.AlCl₃

3.NaCl

4.HNO₃

Question 7 of 20

Question 8 of 20

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

1.Catalytic hydrogenation

2.Combustion

3.Reaction of cold diluted alkaline KMnO₄

4.Polymerization

Question 8 of 20

Question 9 of 20

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

1.Naphtalene

2.Phenanthrene

3.Anthracene

4.Diphenyl methane

Question 9 of 20

Question 10 of 20

10. Ethanol and dimethyl ether are best considered.

1.Stereoisomers

2.Structural isomers

3.Diastereomers

4.Enantiomers

Question 10 of 20

Question 11 of 20

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

1.180°

2.120°

3.100°

4.109.5°

Question 11 of 20

Question 12 of 20

12. Benzene cannot undergo:

1.Addition

2.Oxidation

3.Elimination

4.Subsitution

Question 12 of 20

Question 13 of 20

13. The marsh gas is:

1.Butane

2.Propane

3.Methane

4.Ethane

Question 13 of 20

Question 14 of 20

14. The geometry of acetylene is,

1.Angular

2.Bent

3.Trigonal

4.Linear

Question 14 of 20

Question 15 of 20

15. Shao of benzene molecule is:

1.Trigonal

2.Linear planer

3.Hyxagonal planer

4.Pyramidal

Question 15 of 20

Question 16 of 20

16. Alkanes show geo-metrical isomers due to:

1.Rotation around a single bond

2.Restricted rotation around a double bond

3.Asymmetry

4.Resonance

Question 16 of 20

Question 17 of 20

17. 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 17 of 20

Question 18 of 20

18. The electrophile in aromatic sulphonation is:

1.H₂SO₄

2.HSO⁻₄

3.SO⁻₄

4.SO₃

Question 18 of 20

Question 19 of 20

19. The molecule of ethane posses which hybridization:

1.SP

2.sp²d

3.Sp³

4.Sp²

Question 19 of 20

Question 20 of 20

20. 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 is contains plane of symmetry

4.If it cannot be superimposed to its mirror image

Question 20 of 20

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