The process in which the ore is heated in excess of air below its metling point is known as

The process in which ore is heated in air below its melting point is known as :

A process in which the ore is strongly heated in the absence of air or oxygen is

Heating an ore in the absence of air. below its melting point is called

(A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ore is done by calcinaiton

Assertion: Roasting is a process in which the ore is heated in presence of air Reason: Concentration of sulphide ore is done by calcination