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  3. Chemistry
  4. The main reactions occurring in blast furnace during extraction of iron from haematite are (I) Fe2O3 + 3CO → 2Fe + 3CO2 (II) FeO + SiO2 → FeSiO3 (III) Fe2O3 + 3C → 2Fe + 3CO (IV) CaO + SiO2 → CaSiO3

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Q. The main reactions occurring in blast furnace during extraction of iron from haematite are
(I) $Fe_2O_3 + 3CO \to 2Fe + 3CO_2$
(II) $FeO + SiO_2 \to FeSiO_3 $
(III) $Fe_2O_3 + 3C \to 2Fe + 3CO$
(IV) $CaO + SiO_2 \to CaSiO_3$

General Principles and Processes of Isolation of Elements

Solution:

In the blast furnace during extraction of iron, the following are main reactions :
(i) Reduction of $Fe_2O_3$
$Fe_2O_3 + CO \to 2FeO + CO_2$
$2FeO +2CO \to 2Fe + 2CO_2$
_________________________
$Fe_2O_3 + 3CO \to 2Fe + 3CO_2$
(ii) Slag formation
$CaO + SiO_2 \to \underset{\text{Fusible slag}}{CaSiO_3}$