Study the following chemical equations: (i) CuO + H2 → Cu + H2O
(ii) MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
(iii) 2PbO + C → 2Pb + CO2
(a) Show the oxidation and reduction reactions taking place in each of the above.
(b) Write the oxidising and reducing agents in each.
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