Chem – Chapter 11: Hydrocarbons

1

Which process is used to break down large hydrocarbon molecules into smaller ones?

A Fractional distillation B Cracking C Polymerization D Hydrogenation

2

The main product of complete combustion of hydrocarbons is/are:

A Carbon monoxide and water B Carbon dioxide and water C Carbon and hydrogen D Only carbon dioxide

3

Which of the following is a use of alkanes?

A Fuel B Solvent C Lubricant D All of these

4

Which of the following is an unsaturated hydrocarbon?

A Methane B Ethane C Propane D Ethene

5

Which type of reaction is characteristic of alkanes?

A Addition B Substitution C Elimination D Polymerization

6

Natural gas is mainly composed of:

A Methane B Ethene C Benzene D Ethyne

7

Which process is used to break down large hydrocarbons into smaller ones?

A Fractional distillation B Cracking C Halogenation D Combustion

8

Which gas is produced when alkanes burn completely in oxygen?

A Carbon monoxide B Carbon dioxide C Hydrogen D Nitrogen

9

The general formula CnH2n represents:

A Alkanes B Alkenes C Alkynes D Aromatic hydrocarbons

10

Which of the following is an example of a cyclic hydrocarbon?

A Hexane B Cyclohexane C Ethene D Ethyne

11

What is the process of breaking large hydrocarbon molecules into smaller ones called?

A Combustion B Cracking C Substitution D Addition

12

Which hydrocarbon is aromatic?

A Benzene B Hexane C Hexene D Hexyne

13

The reaction of alkanes with halogens in the presence of sunlight is called:

A Combustion B Substitution C Cracking D Addition

14

Which of the following is a product of complete combustion of alkanes?

A CO B C C CO2 and H2O D H2

15

Which of the following is a major source of hydrocarbons?

A Coal B Petroleum C Natural gas D All of these

16

The reaction of an alkane with halogens in the presence of sunlight is called:

A Addition B Substitution C Elimination D Oxidation

17

Which of the following is not a use of alkanes?

A Fuel B Lubricant C Preparation of polymers D As a solvent

18

What is the IUPAC name of CH3-CH2-CH2-CH3?

A Ethane B Propane C Butane D Pentane

19

Which hydrocarbon contains a carbon-carbon triple bond?

A Alkane B Alkene C Alkyne D Aromatic hydrocarbon

20

Which reaction of alkanes takes place in the presence of sunlight with halogens?

A Combustion B Substitution C Cracking D Addition

21

Butane and isobutane are examples of:

A Isotopes B Allotropes C Isomers D Polymers

22

The IUPAC name of CH3-CH2-CH2-CH3 is:

A Propane B Butane C Pentane D Isobutane

23

Benzene is a typical example of:

A Aliphatic hydrocarbons B Aromatic hydrocarbons C Alkynes D Saturated hydrocarbons

24

In the IUPAC name of an alkane, what does the prefix 'iso-' indicate?

A A straight chain B A branched chain with a methyl group on the second carbon C A double bond D A ring structure

25

Which reaction is characteristic of alkanes?

A Addition B Substitution C Elimination D Polymerization