What is the actual reducing agent of haematite in the blast furnace?

C

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C O

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C O_{2}

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None of the above

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Solution

The correct option is B $C O$
Calcination and roasting oxidises ferrous oxide to ferric oxide. Then, in blast furnace, smelting is done, where it is reduced to get iron.
The reactions involved are as follows:
$4 F e O + O_{2} \to 2 F e_{2} O_{3}$
$3 F e_{2} O_{3} + C O \to 2 F e_{3} O_{4} + C O_{2}$
$F e_{2} O_{3} + C O \to 2 F e O + C O_{2}$
$F e O + C O \to F e + C O_{2}$
Carbon monoxide is the actual reducing agent of hematite in the blast furnace.

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