Question

Identify the substances that are oxidised and the substances that are reduced in the following reactions.
(i) 4Na(s) + O2(g) → 2Na2O(s)
(ii) CuO(s) + H2(g) → Cu(s) + H2O(l)

Answer 1

oxidizing agent Oxygen and reducing agent is hydrogen

Answer 2

I think i) is oxidized and ii) is reduced