Identify from the following reactions the reactants that undergo oxidation and reduction.
a. Fe + S → FeS
b. 2Ag₂O → 4 Ag + O₂ ↑
c. 2Mg + O₂ → 2MgO
d. NiO + H₂ → Ni + H₂O
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Oxidation is the process in which oxygen is added and hydrogen is removed while reduction is the process in which oxygen is removed and oxygen is added.
Fe + S → FeS: Fe is oxidised and S is reduced
2Ag₂O → 4 Ag + O₂ ↑: silver is oxidised and O is reduced
2Mg + O₂ → 2MgO: Mg is oxidised
NiO + H₂ → Ni + H₂O: NiO is reduced
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