Identify from the following reactions the reactants that undergo oxidation and reduction. Fe + S → FeS

Question

Identify from the following reactions the reactants that undergo oxidation and reduction.

i. Fe + S → FeS

ii. 2Ag₂O → 4Ag + O₂↑

iii. 2Mg + O₂ → 2MgO

iv. NiO + H₂ → Ni + H₂O

Answer 1

i. Fe + S → FeS 

In this reaction, Iron (Fe) undergoes oxidation and sulphur. (S) undergoes reduction.

ii. 2Ag₂O → 4Ag + O₂↑

In this reaction, reduction of Ag₂O takes place.

iii. 2Mg + O₂ → 2MgO

In this reaction, oxidation of Mg takes place.

NiO + H₂ → Ni + H₂O

In this reaction, reduction of NiO takes place and oxidation of H₂ takes place.