Question

Question 55
Give the reaction involved during extraction of zinc from its ore by

(a) roasting of zinc ore.
(b) calcination of zinc ore.

Answer 1

(a) Roasting of zinc ore: $\text{2ZnS (s)}+3{\text{O}}_2\to \left(g\right)\stackrel{\text{Heat}}{\to }2\text{ZnO(s)}+2{\text{SO}}_2\text{(g)}$
(b) Calcination of zinc ore: ${\text{ZnCO}}_3\text{(s)}\stackrel{\text{Heat}}{\to }\text{ZnO(s)}+{\text{CO}}_2\text{(g)}$