Give one example of an oxidation-reduction reaction which is also:
(a) A combination reaction
(b) A displacement reaction
Give one example of an oxidation-reduction reaction which is also:
(a) A combination reaction
(b) A displacement reaction

(a) 2Cu + O2 → 2CuO (in the presence of heat)

Copper oxide is formed when copper reacts with oxygen in an oxidation-reduction reaction.

(b) CuO + H2→ Cu + H2O

Dihydrogen oxide is formed when hydrogen displaces copper along with water.