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

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Question 1 of 20

Chemistry

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

1.NaCl

2.BeCl₃

3.HNO₃

4.AlCl₃

Question 1 of 20

Question 2 of 20

2. The isomers of a substance must have:

1.Same structural formula

2.Same chemical properties

3.Same molecular weight

4.Same functional groups

Question 2 of 20

Question 3 of 20

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

1.Diphenyl methane

2.Anthracene

3.Naphtalene

4.Phenanthrene

Question 3 of 20

Question 4 of 20

4. The general formula of alkane is

1.CnH₂

2.CnH₂n₊₂

3.CnHn

4.CnH₂n

Question 4 of 20

Question 5 of 20

5. Sodalime is:

1.NaOH

2.CaO and NaOH

3.KOH

4.Mixture of Na & Ca hydroxide

Question 5 of 20

Question 6 of 20

6. 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 6 of 20

Question 7 of 20

7. Acidic hydrogen is present:

1.Ethene

2.Acetylene

3.Benzene

4.Ethane

Question 7 of 20

Question 8 of 20

8. The geometry of acetylene is,

1.Linear

2.Bent

3.Angular

4.Trigonal

Question 8 of 20

Question 9 of 20

9. Alkanes show geo-metrical isomers due to:

1.Restricted rotation around a double bond

2.Resonance

3.Rotation around a single bond

4.Asymmetry

Question 9 of 20

Question 10 of 20

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

1.Dealkylation

2.Aromatization

3.Isomerization

4.Rearrangement

Question 10 of 20

Question 11 of 20

11. The marsh gas is:

1.Methane

2.Ethane

3.Butane

4.Propane

Question 11 of 20

Question 12 of 20

12. The electrophile in aromatic sulphonation is:

1.H₂SO₄

2.SO⁻₄

3.HSO⁻₄

4.SO₃

Question 12 of 20

Question 13 of 20

13. Ethanol and dimethyl ether are best considered.

1.Enantiomers

2.Structural isomers

3.Diastereomers

4.Stereoisomers

Question 13 of 20

Question 14 of 20

14. The benzene molecule contains:

1.Two double bonds

2.Three double bonds

3.Delocalized

4.One double bond

Question 14 of 20

Question 15 of 20

15. Benzene cannot undergo:

1.Elimination

2.Addition

3.Subsitution

4.Oxidation

Question 15 of 20

Question 16 of 20

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

1.120°

2.109.5°

3.180°

4.100°

Question 16 of 20

Question 17 of 20

17. 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.Position isomer

4.Structural

Question 17 of 20

Question 18 of 20

18. Shao of benzene molecule is:

1.Hyxagonal planer

2.Linear planer

3.Trigonal

4.Pyramidal

Question 18 of 20

Question 19 of 20

19. A molecule is said to be chiral:

1.If it contains center of symmetry

2.If it cannot be superimposed to its mirror image

3.If is contains plane of symmetry

4.If it can be superimposed on its mirror image

Question 19 of 20

Question 20 of 20

20. The molecule of ethane posses which hybridization:

1.Sp³

2.sp²d

3.Sp²

4.SP

Question 20 of 20

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