(i) As the ore produces SO2 gas on heating, it should be a sulphide ore. This ore is concentrated by converting them into oxides by roasting followed by reduction in the presence of carbon.
(ii) The two steps involved in the conversion of sulphide ore into related metal are:
(a) The concentrated ore is first converted to its oxide by the process of roasting.
(b) Then the metal oxide is reduced with the help of a reducing agent like carbon.