Which of the following ores are extracted by converted to matallic oxides, roasting, calcinations

The ores of Zinc, iron, tin, lead and copper metals are generally present as Sulphides or Carbonates in native. Therefore prior to reduction of ores of these metals, they must be converted into metal oxides. Sulphide ores are converted into oxides by heating them strongly in excess of air. Carbonate ores are converted into oxides by heating them in the options of air.