question_answer 86)

    Give the reaction involved during extraction of zinc from its ore by roasting of zinc ore.  (b) calcination of zinc ore.

Answer:

                 (a)Roasting of zinc ore Roasting is done for the sulphide ore. Sulphide ore of zinc is ZnS (zinc blende) is then reduced to zinc by heating with coke (carbon) (b) Calcination of zinc ore Calcination is done for the carbonate ore. Carbonate ore of Zn is calamine. is then reduced to zinc by heating with coke (carbon)