Chemistry - Metallurgy Question with Solution | TestHub

(P) $\underset{\text{ (Galena) }}{\mathrm{PbS}}+\frac{3}{2}{\mathrm{O}}_2\stackrel{\Delta }{\to }\underset{\text{ (Metal oxide) }}{\mathrm{PbO}}+{\mathrm{SO}}_2\uparrow$

(Q)

$$\underset{(\text{ Calamin })}{{\mathrm{ZnCO}}_3}\stackrel{\Delta }{\to }\underset{\begin{array}{c}\text{ (Calcinated }\text{ Cala min }\mathrm{e})\end{array}}{\mathrm{ZnO}}+{\mathrm{CO}}_2\uparrow$$

(R) Alluvial sand contain valuable ores such as gold and platinum.  

(S) When cast iron is heated in furnace lined with haemetite then purest from of iron is obtained i.e. "Wrought iron