Question

define calcination and roasting​

Answer 1

Answer:

Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc.

Answer 2

Answer:

Calcination- The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide....

Explanation:

Roasting- The process in which a sulphide ore is strongly heated in the presence of the air to convert it into metal oxide.......