Extraction of zinc from zinc blende $(ZnS)$ is achieved by:

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 :

The chemical reaction that involves the roasting process is:

The reaction $2ZnS + 3O_2 \to 2ZnO + 2SO_2$ in the metallurgical process of zinc is called:

Explain Calcination and Roasting in detail.

$A$ sulphide ore is first converted into its oxide before reduction. This is done because