Question

what is roasting and calcination in metals amd non metals?​

Answer 1

Explanation:

Roasting : It is the process of converting an ores to oxide by strongly heating it in the presence of excess of air . ... Calcination : It is the process of converting an ores to oxide by strongly heating it in limited air . For example carbonate ores are converted into the oxide by heating in the absence of air.

Answer 2

Explanation:

roasting: sulphide salts of metals are strongly heated in presence of air to obtain it's oxide.This is called as roasting

calcination: carbonate salts of metals are strongly heated in limited supply of air to obtain its oxide.This

is called as calcination