Redox

Question 1

Oxidation

Answer 1

Increase in oxidation number

Question 2

Reduction

Answer 2

Decrease in oxidation number

Question 3

Reducing agents

Answer 3

Lose electrons because they are oxidised

Question 4

Oxidising agents

Answer 4

Gain electrons because they are reduced

Question 5

Heterogeneous catalyst

Answer 5

Catalysts in a different state compared to the reactants. Provides alternative reaction pathway with a lower activation energy