Question

Which of the following is obtained during the roasting process?

• A. Metal sulphate
• B. Metal oxide
• C. Metal chloride
• D. Metal fluoride

Answer 1

The correct option is B Metal oxide

Roasting is a process of heating the concentrated ore at the temperature below its melting point in the presence of air. Sulphide ores are converted into its oxide by this process.

For example, zinc sulphide is converted to zinc oxide by heating it in the presence of oxygen. The reaction involved is given below:

$\text{2ZnS(s)}+{\text{3O}}_2\text{(g)}\to \text{2ZnO(s)}+{\text{2SO}}_2\text{(g)}$