Question

Name an ore of zinc other than zinc oxide. And also name the process by which this ore can be converted into zinc oxide?[2 MARKS]

Answer 1

Each point: 1 Mark

1. The ore of zinc other than zinc oxide (zincite) is zinc carbonate (calamine). It has the formula $\text{Zn}\text{C}{\text{O}}_3$.
2. Calamine is converted into zinc oxide by calcination i.e., by heating strongly in the absence of air. The reaction involved is:

$\text{Zn}\text{C}{\text{O}}_3\text{(s)}$ $\to$ $\text{Zn}\text{O}\text{(s)}$ + $\text{C}{\text{O}}_2\text{(g)}$