Question

Calamine ore can be converted into zinc oxide by the process of ______.

Options

• dehydration

• roasting

• calcination

• sulphonation

Answer 1

Calamine ore can be converted into zinc oxide by the process of calcination.

Explanation:

Calamine is a carbonate ore consisting mainly of zinc carbonate (ZnCO₃), which must be converted into zinc oxide by heating it strongly in the absence or limited supply of air. This specific thermal decomposition process is called calcination, and it drives off carbon dioxide gas, leaving behind solid zinc oxide.