Metallurgy

Among the following, the main reactions occurring in blast furnace during extraction of iron from haematite are

(i) \(\mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{CO} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_2\)

(ii) \(\mathrm{FeO}+\mathrm{SiO}_2 \rightarrow \mathrm{FeSiO}_3\)

(iii) \(\mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{C} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}\)

(iv) \(\mathrm{CaO}+\mathrm{SiO}_2 \rightarrow \mathrm{CaSiO}_3\)