Extraction of Metals - Result Question 12
####12. The reaction that does not define calcination is
(a)
(2019 Main, 11 Jan II)
(b)
(c)
(d)
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Solution:
- Calcination is one of the pyrometallurgical process, like roasting by which a concentrated ore gets converted into its oxide.
In calcination, a hydrated carbonate or bicarbonate ore or a hydrated ore is heated at lower temperature (compared to
roasting) in absence of air to give its oxide as in options (a), (b) and (c). Here, volatile non-metallic oxides like
Roasting is valid mainly for sulphide ores like option (d), where
