Identify x,y,z for the following metallurgical process :
metal sulphide `overset(x)rarr` metal oxide `overset(y)rarr` impure metal `overset(z)rarr` pure metal
generally x,y and z are respectively:

Options

A. roasting, smelting, electrolysis
B. roasting, calcination, smelting.
C. calcination, auto-reduction, bassemerisation
D. None of the above is correct

Answer

A

Explanation

The conversion of metal sulphide to metal oxide involves the process of roasting (i.e., x is roasting). The metal oxides can then be converted to impure metal by reduction. Of the given choices in (a) and (b) the reduction process is that of smelting. (i.e., .y. is smelting). The conversion of impure metal to pure metal involves a process of purification. Thus it is electrolysis.