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An ore gives carbon dioxide on treatment...

An ore gives carbon dioxide on treatment with a dilute acid. What steps will you take to convert such a concentrated ore into free metal?

A

Calcination then oxidation

B

Calcination then reduction

C

Oxidation then Calcination

D

Reduction then calcination

Text Solution

Verified by Experts

The correct Answer is:
B
Whenever a metal carbonate reacts with a dilute acid, carbon dioxie is formed. Since this ore gives carbon dioxide on treatment with a dilute acid, so it is a carbonate ore. A carbonate ore can be
converted into free metal in two steps: calcination and reduction:
(i). The carbonate ore is strongly heated in the absence of air (calcined) to get the metal oxide:
`underset(("carbonate ore"))("Metal carbonate")overset("calcination")to"Metal oxide"+"Carbon dioxide"`
(ii) The metal oxide is reduced with carbon to get free metal:
Metal oxide+Carbon `overset("Reduction")to` Metal+Carbon monoxide.
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