Question

In the conversion of a zinc ore to zinc metal, the process of roasting involves

(a) ZnCO₃ → ZnO

(b) ZnO → ZnSO₄

(c) ZnS → ZnO

(d) ZnS → ZnSO₄

Answer 1

Answer is : (c) ZnS → ZnO

In the process of roasting, sulphide ore is converted into an oxide ore with a regular supply of air in a furnace at a temperature below the melting point of the metal.

Thus, the conversion of sulphide ore into metal oxide is given the reaction ZnS → ZnO.