The earthly impurities in iron ore are removed in the blast furnace by the reaction
CO2 + C →2CO
Fe2O3 + 3CO →2Fe + 3CO2
SiO2 + CaO →CaSiO3
CaCO3 → CaO + CO2
C +CO2 → CO2
Correct answer is C
No explanation has been provided for this answer.
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