The mixture obtained from the roasting of copper pyrites is ......... .

Calcination is used in metallurgy for the removal of

In order to bring initial chemical change in the ore,the process of heating of ore below its melting point is known as

What is the function of calcination in metallurgy?

Given below are two statements:
Statement-$I$ : In the metallurgy process,sulphide ore is converted to oxide before reduction.
Statement-$II$ : Oxide ores in general are easier to reduce.
In the light of the above statements,choose the most appropriate answer from the options given below :

Roasting of copper pyrites ores is for the following purposes: