(a) Iron is extracted from haematite ore.
(b) Bauxite; Aluminium oxide, Al2O3.2H2O
(c) Aluminium metal is extracted by the electrolytic reduction (electrolysis) of molten aluminium oxide. When electric current is passed through molten aluminium oxide, it decomposes to form aluminium metal and oxygen gas.
(d) Aluminium metal is produced at Cathode (Negative electrode).
(e) Oxygen gas is produced; at anode (Positive electrode).