Definition

Question 1

Define redox reaction

Answer 1

A redox reaction is a reduction-oxidation reaction in which the reduction and oxidation occur at the same time.

Question 2

Oxidation number

Answer 2

Oxidation number of an element is the imaginary charge carried by that element as if it exists as an ion.

Question 3

Reduction

Answer 3

Reduction means accepting electron(s) and it causes a decrease in oxidation number of a particular element in a reactant.

Question 4

Oxidation

Answer 4

Oxidation means losing electron(s) and it causes a ijcrease in oxidation number of a particular element in a reactant.

Question 5

Disproportionation

Answer 5

Disproportionation (a special case of redox reaction) is a chemical reaction in which a particular chemical species (molecule/ ion) is sitmultaneously oxidized and reduced

Question 6

Electroplating

Answer 6

Electroplating is the process to coat a thin layer of metal on an electrical conducting object by electrolysis

Question 7

Definition of anodization

Answer 7

anodization is a process to increase the thickness of the aluminium oxide layer by electrolysis

Question 8

How to do extraction of reactive metals?

Answer 8

reactive metals are extracted by electrolysis of their molten chlorides or oxides using inert electrodes.