The chief reaction(s) occurring in blast furnace during extraction of iron from haematite is(are) :

F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}

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F e O + S i O_{2} \to F e S i O_{3}

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F e_{2} O_{3} + 3 C \to 2 F e + 3 C O

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C a O + S i O_{2} \to C a S i O_{3}

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Solution

The correct options are
A $F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$
C $C a O + S i O_{2} \to C a S i O_{3}$
D $F e_{2} O_{3} + 3 C \to 2 F e + 3 C O$
Reaction occurs in blast furnace are-
In the blast furnace, haematite is so hot that carbon monoxide can be used, in place of carbon, to reduce the iron(III) oxide:

$F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$

Carbon is more reactive than iron, so it can displace iron from iron(III) oxide. Here is the equations for the reaction:

$F e_{2} O_{3} + 3 C \to 2 F e + 3 C O$

$C a O + S i O_{2} \to C a S i O_{3}$ (slag formation)
Option A, B and C are correct.

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