Question

Calcination is defined as:

• A. Heating of sulphide ores in presence of air
• B. Heating of sulphide ores in absence of air
• C. Heating of carbonate ores in presence of air
• D. Heating of carbonate ores in absence of air

Answer 1

The correct option is D

Heating of carbonate ores in absence of air

Calcination is a process in which ore is heated in the absence of air. As a result of calcination, carbonate ore is converted into its oxide.
Example: $ZnC{O}_3$ $\to$ $ZnO+C{O}_2$