Chemistry - Metallurgy Question with Solution | TestHub

A mixture of$PbS$and$\mathrm{PbO}$undergoes self-reduction to produce$\mathrm{Pb}$and${\mathrm{SO}}_2.$

In the extraction process of copper from copper pyrites, silica is added to produce copper silicate.

Partial oxidation of sulphide ore of copper by roasting, followed by self-reduction produces blister copper.

In cyanide process, zinc powder is utilized to precipitate gold from$\mathrm{Na}\left[\mathrm{Au}{\left(\mathrm{CN}\right)}_2\right].$