Chemistry - Metallurgy Question with Solution | TestHub

Question Explanation: Identify the common impurities present in Bauxite ( ${\mathrm{Al}}_2{\mathrm{O}}_3\cdot 2{\mathrm{H}}_2\mathrm{O}$ ). Concept: Impurities in Bauxite.

Solution: Bauxite ore commonly contains impurities such as Iron oxides $\left({\mathrm{Fe}}_2{\mathrm{O}}_3\right)$, Silica $\left({\mathrm{SiO}}_2\right)$, and Titanium dioxide ( ${\mathrm{TiO}}_2$ ).

Bauxite is the principal ore of aluminium.

It usually contains ${\mathrm{SiO}}_2$, iron oxides and titanium oxide ( ${\mathrm{TiO}}_2$ ) as impurities.

Hence, option (3), (4) is the correct option.

Final Answer: ${\mathrm{Fe}}_2{\mathrm{O}}_3$ and ${\mathrm{SiO}}_2$