Question

differentiate between Roasting of medium reactivity metals and Roasting of high reactivity metals​

Answer 1

Metals of medium reactivity level Sulphides ores are converted into oxides by heating strongly in the presence of excess air. Sulphur impurities can escape as gas, this process is known as roasting. ... Calcination is a process where the ore is converted into oxides by heating strongly in the presence of excess air.