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Mention the role of following : (a) Si...

Mention the role of following :
(a) `SiO_2` in the metallurgy of Cu.
(b) `CaCO_3` in the metallurgy of Fe.
(c) CO in the metallurgy of iron.
(d) `I_2` in the purification of zirconium.

Text Solution

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(a) Flux
(b) `CaCO_3` decomposed to `CaO` which acts as flux.
(c) Reducing agent
(d) To form a volatile complex with Zr.
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