Basis of differentiation

Oxidation reactions

Reduction reactions

Definition 

Oxidation occurs when a reactant loses electrons during the reaction, resulting in an increase in oxidation number

Reduction occurs when a reactant gains electrons during the reaction, resulting in a decrease in oxidation number

Sign of oxidation state

(+)

(-)

Agent

Oxidizing agents cause oxidation and are themselves reduced

Reducing agents cause reduction and are themselves oxidized

Endothermic or exothermic

Are often exothermic

Are often endothermic