The reaction(s) which (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are):-

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

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

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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
C $F e_{2} O_{3} + 3 C \to 2 F e + 3 C O$
D $C a O + S i O_{2} \to C a S i O_{3}$
Extraction
of iron is based on the reduction of Haematite ( $F e_{2} O_{3}$ )
with carbon.
The
process of the extraction of iron is carried out by the following steps:
1)
Concentration of ore
2) Calcination or Roasting of ore
3)
Reduction of ore
Reduction of ore:
The blast oxidizes carbon to $C O_{2}$ .
$C+O_2\rightarrow

CO_2+heat$.
Formation
of CO2 is an exothermic reaction in which a huge amount of heat
is liberated which rises the temperature to 1900OC
in this region. As the $C O_{2}$ passes upwards, it reacts more coke
to form carbon monoxide.$CO_2+C\rightarrow

2CO$.
Reactions
in blast furnace;
$F e_{2} O_{3} + 3 C \to 2 F e + 3 C O$
$F e_{3} O_{4} + 4 C O \to 3 F e + 4 C O_{2}$
$C O_{2} + C \to 2 C O$
Overall
reaction ; $F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$ ..
Slag
formation: $C a C O_{3} \to C a O + C O_{2}$ ..
$C a O + S i O 2 \to C a S i O_{3}$ .
So the reactions in the options A,B are not preesent
Hence options C, D are correct.

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Similar questions

C + O_{2} \to C O_{2}

C O_{2} + C \to 2 C O

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

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

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

C + O_{2} \to C O_{2}

C O_{2} + C \to 2 C O

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

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

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

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

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

2 C + O_{2} \to 2 C O

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

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

(B) 3 F e_{2} O_{3} + C O \to 2 F e_{3} O_{4} + C O_{2}

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

(D) F e O \to F e + \frac{1}{2} O_{2}

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