Question

The process of heating an ore to a high temperature in the presence of air.

Answer 1

• The process of heating an ore at a high temperature is Roasting.
• It is used for converting sulfide ores into corresponding oxides thereby making the extraction process more effective.
• The sulfide ore of Zinc that is Zinc blende or Zinc sulfide undergoes a roasting process for removing the impurities.
• The reaction is, $\underset{Zincsulfide}{2ZnS\left(s\right)}+\underset{Oxygen}{3O_2\left(g\right)}\to \underset{Zincoxide}{2ZnO\left(s\right)}+\underset{Sulfurdioxide}{2S{O}_2\left(g\right)}$

Hence, Roasting is the process of heating an ore to a high temperature in the presence of air.