Reduction –
- Gain of election
- Addition of hydrogen
- Removal of Oxygen
Examples are -Rusting ,Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)
Reducing agent – Doner of electron is called reducing agent . hydrogen ,Carbon, Carbon monoxide, Ascorbic acid, Sulphur dioxide, Hydrogen, Oxalic acid, Phosphites, phosphorous acid, hypophosphites