Question

ldentify the substance that is oxidised and the substance that
is reduced in the following two reactions

i) 4Na(s) + O2(g) => 2Na2O(s)

ii) CuO(s) + H2(g) => Cu(s) + H2O(l)

Answer 1

1. Oxidisation (Sodium is Oxidized)
2. Reduction (Copper is Reduced)