Chemistry - Metallurgy Question with Solution | TestHub

Pb and Sn are extracted from their chief ore by self reduction and carbon reduction respectively.
Self reduction
$2\mathrm{P}\mathrm{b}\mathrm{S}+3{\mathrm{O}}_2\stackrel{\mathrm{\Delta }}{\to }2\mathrm{P}\mathrm{b}\mathrm{O}+2\mathrm{S}{\mathrm{O}}_2$
$\text{2PbO}\text{+}\text{PbS}\stackrel{\text{Δ}}{\to }\text{3Pb}\text{+}{\text{SO}}_{\text{2}}\text{(self}\text{reduction)}$
${\text{SnO}}_{\text{2}}\text{+}\text{2C}\stackrel{\text{Δ}}{\to }\text{Sn}\text{+}\text{2CO}\text{(Carbon}\text{reduction)}$