Question

Calamine ore can be converted into zince oxide by the process of:
(a) roasting (b) hydrogenation (c) chlorination (d) calcination

Answer 1

(d) calcination

Calamine $(ZnC{O}_3$, zinc carbonate) is a carbonate ore of zinc. Carbonate ores are converted to metal oxides by calcination (heating in the absence of air). When calamine ore (zinc carbonate) is heated in the absence of air, it is converted into zinc oxide.