Question

Give two examples for oxidation-reduction reaction.

Answer 1

P4(s) + 5 O2(g) P4O10(s)
Cu(s) + 2 Ag+(aq) Cu2+(aq) + 2 Ag(s)

Answer 2

2Cu +O2-> 2CuO (oxidization reaction)
CuO + H2-> Cu + H2O (reduction )
2Pb + O2-> 2PbO (oxidation )
PbO + H2-> Pb + H2O (reduction )