Question

Explain how is zinc obtained from sulphide ore carbonate or different between the two given chemical reaction

Answer 1

ZnCO3  undergoes calcination ie, it is heated in the absence of oxygen

ZnCO3  ⇒ZnO + CO2

ZnS undergoes roasting ie , it is heated in the presence of O2

ZnS+O2⇒ZnO+SO2

After zinc oxide is obtained from the above two processes, it is reduced with Carbon to get zinc

ie,  ZnO+C⇒Zn+CO