Question

why should the metal sulphite and carbonate converted into metal oxide by the process of excrition of metal from them​

Answer 1

Answer:

Explanation:

This is because it is easier to obtain metals from their oxides (by reduction) than from carbonate or sulphide ores. So, before reduction the ore must be converted into metal oxide which can then be reduced. Caicination or roasting is done depending on the nature of ore, to convert the ore into oxide.