Question

why metal sulphides & carbonate are concentrated into metal oxide prior to reduction. ​

Answer 1

It is easier to obtain metals from their oxides rather than from carbonates or sulphides. So the ore is first converted into an oxide

Answer 2

Hey

☆ It is easy to obtain the metals from oxides ores rather than sulphide and carbonate ores

☆ So they are reduced into metal oxides prior to reduction