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Carbon reduction method is employed for commercial extraction of?

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Haematite

Cassiterite

Both 1 and 2

Corundum

answer is C.

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Detailed Solution

● In extraction of tin from cassiterite-

{SnO}_{2} {+ 2 C \to}_{} {Sn + 2 CO}_{}

● In extraction of iron from haematite -

{Fe 2 O}_{3} {+ 3 CO \to 2 Fe + 3 C O_{2}}_{}

● The froth flotation process is used to extract iron pyrite FeS2, a sulphide mineral.
● Corundum is a crystalline form of aluminium oxide Al2O3 that is generated by electrolytic reduction and contains traces of iron, titanium, and chromium.

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