Roasting of copper pyrites is done:

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

Roasting of copper pyrites is done: (1) To remove moisture and volatile impurities (2) To oxidise free sulphur (3) To decompose pyrites into

\text{Cu}_2\text{S}

and

\text{FeS}

(4) To decompose

\text{Cu}_2\text{S}

into blister copper