A metal carbonate reacts
with a dilute acid to form carbon dioxide. Therefore, this ore is a carbonate
ore. Carbonate ore is converted into free metal in the following two steps:
(i) Calcination: The carbonate ore is strongly
heated in the absence of air to get the metal oxide.
carbonate Metal oxide + Carbon dioxide
Reduction: The metal oxide is reduced with carbon to get free metal.
oxide + Metal + Carbon monoxide
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