Question

Sulphide ores are converted into its oxides by the process of.

• A. calcination
• B. roasting
• C. froath flotation

Answer 1

The correct option is B roasting

Sulphide ores are converted into its oxides by heating strongly in the presence of excess air. This process is known as roasting.

For example:
${\text{2Cu}}_{\text{2}}\text{S (s)}+{\text{3O}}_{\text{2}}\text{(g)}\to {\text{2Cu}}_{\text{2}}\text{O (s)}+{\text{2SO}}_{\text{2}}\text{(g)}$