Question

Thin strips of Magnesium Copper and iron are taken write down what happened when these metal are treated as follows first heat in presence of air II heat with dilute hydrochloric acid or third added to an aqueous solution of zinc sulphate

Answer 1

Air:
MgO 
CuO
Ferrous oxide

H2SO4
MgSO4 +H2
CuSO4+H2
FeSO4+H2

Answer 2

2Mg + O2 = 2MgO
2Cu + O2 = 2CuO
2Fe + 3O2 = 2Fe2O3
Mg + 2HCl = MgCl2 + H2
Cu + 2HCl = CuCl2 + H2
Fe + 2HCl = FeCl2 + H2
Mg + ZnSO4 = MgSO4 + Zn
Cu + ZnSO4 = no reaction. zinc more reactive than Cu. Fe + ZnSO4 =no reaction.zinc more reactive than iron.