CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
Calamine ore can be converted into zinc oxide by the process of :
A
Dehydration.
B
Roasting.
✓
Calcination.
D
Sulphonation.
✓
Answer
Correct option: C.
Calcination.
Calamine $(\mathrm{ZnCO}_3$, zinc carbonate$)$ is a carbonate ore of zinc. Carbonate ores are converted to metal oxides by calcination $($heating in the absence of air$)$. When calamine ore $($zinc carbonate$)$ is heated in the absence of air, it is converted into zinc oxide.
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