Give balanced equations for the reducing reactions of ammonia with
(i) copper (II) oxide,
(ii) lead (II) oxide,
(iii) chlorine using,
(a) excess NH3 ,
(b) excess Cl2 .
(i) 2NH3[basic oxide] + 3CuO → 3Cu + 3H2O + N2[g]
(ii) 2NH3 + 3PbO[amphoteric oxide] → 3Pb + 3H2O + N2[g]
