Which of the following reactions is NOT an example of a roasting process? — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Roasting involves heating the ore (usually sulphide) in a regular supply of air to convert it to an oxide. Calcination involves heating the ore (usually carbonate or hydrated oxide) in the absence or limited supply of air to decompose it, such as $ZnCO_3 \rightarrow ZnO + CO_2$.