Oxidation And Reduction

Question 1

Oxidation number

Answer 1

“The charge that an atom has or appears to have when electrons are distributed according to certain rules”

Question 2

Oxidation

Answer 2

Loss of electron

Question 3

Reduction

Answer 3

Gain of electron

Question 4

Use of displacement reactions

Answer 4

To place elements in order of reactivity and extract valuable copper from solutions of its salts using scrap iron

Question 5

Redox reaction

Answer 5

Involve both reduction and oxidation

Question 6

Oxidising agent

Answer 6

A substance that allows oxidation to happen by gaining electrons

Question 7

Reducing agent

Answer 7

A substance that allows reduction to happen by losing electrons

Question 8

Why is recycling of batteries desirable?

Answer 8

To avoid pollution/ sustainable method of energy provision/ economically desirable

Question 9

Hydrolysis

Answer 9

The decomposition of a compound by means of water, the water also being decomposed in the reaction

Question 10

Define Reduction in terms of oxidation number

Answer 10

Reduction is the decrease in oxidation number