Chemistry - Metallurgy Question with Solution | TestHub

Calcination is a process in which ore is heated mainly in the absence of air whereas roasting is a process in which ore is heated in the presence of air.
$2\mathrm{C}{\mathrm{u}}_2\mathrm{S}+3{\mathrm{O}}_2\stackrel{\mathrm{\Delta }}{\to }2\mathrm{C}{\mathrm{u}}_2\mathrm{O}+2\mathrm{S}{\mathrm{O}}_2\left(\mathrm{R}\mathrm{o}\mathrm{a}\mathrm{s}\mathrm{t}\mathrm{i}\mathrm{n}\mathrm{g}\right)$