The main function of roasting is

Roasting involves

Explain Calcination and Roasting in detail.

Which of the following changes is not observed when an ore is heated for calcination?

Consider two chemical reactions $(A)$ and $(B)$ that take place during metallurgical processes:
$(A)$ $ZnCO_{3(s)} \longrightarrow ZnO_{(s)} + CO_{2(g)}$
$(B)$ $2ZnS_{(s)} + 3O_{2(g)} \longrightarrow 2ZnO_{(s)} + 2SO_{2(g)}$
The correct names for these processes are:

Which of the following is an example of the calcination process?