Question

A metallic ore 'X' reacts with dilute HCI to liberate a gas which turns lime water milky. Another ore'Y' gives off a gas with the smell of rotten eggs on treatment with the same acid. Which metallurgical processes are used for the extraction of the metals X and Y?

Answer 1

X is a carbonate ore since it gives off carbon dioxide on treatment with HCl. So, X is extracted by the process of calcination. Y gives off hydrogen sulphide gas on treatment with dilute HCl. So, it is a sulphide ore which is extracted by roasting