A metallic ore 'X' reacts with dilute HCl 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 ?

A metallic ore 'X' reacts with dilute HCl to liberate a gas which turn

1.	A metallic ore 'X' reacts with dilute HCl 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» SOLUTION :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.