Alkanes

Question 1

Most importance spurce of alkane

Answer 1

Petroleum

Question 2

Components of natural gas

Answer 2

Methane 70-90%, ethane propane, butane and trace amounts of CO2, HS, N, Helium

Question 3

Natural gas and petroleum are known as

Answer 3

Fossil fuel

Question 4

As the molecular size of alkanes increases, its dispersion force also ____

Answer 4

Increases

Question 5

For compounds in homologous series, the larger the MW, The _____ the bp due to increase in dispersion forces

Answer 5

Higher

Question 6

For compounds with the same MW, the larger the surface are, the ____ the boiling point

Answer 6

Higher

Question 7

Reactions in alkane

Answer 7

Combustion and Halogenation

Question 8

Oxidation in alkane results in
____ C-Z where Z can usually be Oxygen, and ____ in C-H

Answer 8

Increase of CO and decrease of CH

Question 9

Reduction in alkanes results in ____ of CH and the ___ of CO

Answer 9

Increase, decrease

Question 10

This occur in presence of heat or light converting alkanes to alkyl halides

Answer 10

Halogenation

Question 11

The reaction is a radical substitution because the X replaces H by radical intermediate

Answer 11

Halogenation of alkanes

Question 12

______ forms mixture of products

Answer 12

Chlorination

Question 13

____ is selective and often form major or one product

Answer 13

Bromination

Question 14

In this step, the bond cleavage forms two radicals

Answer 14

Initiation

Question 15

One radical reacts and a new radical is formed

Answer 15

Propagation

Question 16

The two radicals react to form a sigma bond

Answer 16

Termination