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

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Question 1 of 20

Chemistry

1. 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.Stereoisomerism

4.Identical

Question 1 of 20

Question 2 of 20

2. The marsh gas is:

1.Ethane

2.Methane

3.Butane

4.Propane

Question 2 of 20

Question 3 of 20

3. Benzene cannot undergo:

1.Subsitution

2.Oxidation

3.Elimination

4.Addition

Question 3 of 20

Question 4 of 20

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

1.BeCl₃

2.AlCl₃

3.NaCl

4.HNO₃

Question 4 of 20

Question 5 of 20

5. Shao of benzene molecule is:

1.Hyxagonal planer

2.Linear planer

3.Pyramidal

4.Trigonal

Question 5 of 20

Question 6 of 20

6. Ethanol and dimethyl ether are best considered.

1.Diastereomers

2.Enantiomers

3.Stereoisomers

4.Structural isomers

Question 6 of 20

Question 7 of 20

7. Alkanes show geo-metrical isomers due to:

1.Asymmetry

2.Resonance

3.Rotation around a single bond

4.Restricted rotation around a double bond

Question 7 of 20

Question 8 of 20

8. A molecule is said to be chiral:

1.If is contains plane of symmetry

2.If it contains center of symmetry

3.If it can be superimposed on its mirror image

4.If it cannot be superimposed to its mirror image

Question 8 of 20

Question 9 of 20

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

1.Anthracene

2.Naphtalene

3.Diphenyl methane

4.Phenanthrene

Question 9 of 20

Question 10 of 20

10. The geometry of acetylene is,

1.Linear

2.Trigonal

3.Bent

4.Angular

Question 10 of 20

Question 11 of 20

11. Sodalime is:

1.CaO and NaOH

2.Mixture of Na & Ca hydroxide

3.NaOH

4.KOH

Question 11 of 20

Question 12 of 20

12. Acidic hydrogen is present:

1.Ethane

2.Acetylene

3.Ethene

4.Benzene

Question 12 of 20

Question 13 of 20

13. The isomers of a substance must have:

1.Same molecular weight

2.Same structural formula

3.Same functional groups

4.Same chemical properties

Question 13 of 20

Question 14 of 20

14. The benzene molecule contains:

1.Three double bonds

2.Two double bonds

3.One double bond

4.Delocalized

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.Rearrangement

2.Dealkylation

3.Isomerization

4.Aromatization

Question 15 of 20

Question 16 of 20

16. The general formula of alkane is

1.CnH₂n

2.CnHn

3.CnH₂

4.CnH₂n₊₂

Question 16 of 20

Question 17 of 20

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

1.109.5°

2.180°

3.100°

4.120°

Question 17 of 20

Question 18 of 20

18. The electrophile in aromatic sulphonation is:

1.H₂SO₄

2.SO⁻₄

3.SO₃

4.HSO⁻₄

Question 18 of 20

Question 19 of 20

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

1.Polymerization

2.Reaction of cold diluted alkaline KMnO₄

3.Catalytic hydrogenation

4.Combustion

Question 19 of 20

Question 20 of 20

20. The molecule of ethane posses which hybridization:

1.Sp³

2.Sp²

3.sp²d

4.SP

Question 20 of 20

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