Question

In the process of extracting Zinc, the Zinc blende ore is roasted. Write the equation reaction which takes place when the sulfide ore is roasted.

Answer 1

• The ore of zinc-containing sulfide is Zinc blende.
• Its chemical name is Zinc sulfide and has the chemical formula $\mathit{Z}\mathit{n}\mathit{S}$.
• Heating ore at a temperature lower than its melting point in presence of oxygen is called roasting.
• The sulfide present in the ore gets converted into its corresponding oxides by this process.
• The reaction is: $\underset{Zinc\mathit{}sulfide}{\mathit{2}ZnS\mathit{\left(}s\mathit{\right)}}+\underset{\mathrm{Oxygen}}{3O_2\mathit{\left(}g\mathit{\right)}}\stackrel{∆}{\to }\underset{Zinc\mathit{}oxide}{\mathit{2}ZnO\mathit{\left(}s\mathit{\right)}}+\underset{Sulfur\mathit{}dioxide}{\mathit{2}S{O}_{\mathit{2}}\mathit{\left(}g\mathit{\right)}}$.