Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.

Explanation

Extraction of pure metals from Carbonate ores `to`
(i) Concentration of ores
Gangue is removed from the ore.
(ii) Calcination
The carbonate ore is heated strongly in absence of air
`ZnCO_3 overset"HEAT"to ZnO(s) +CO_2(g)`
(iii) Reduction by carbon or more reactive metal
`ZnO(s) + C(s) to Zn(s) + CO(g)`