The earthly impurities in iron ore are removed in the blast furnace by the reaction?

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A. CO2 + C →2CO
B. Fe2O3 + 3CO →2Fe + 3CO2
C. SiO2 + CaO →CaSiO3
D. CaCO3 → CaO + CO2
E. C +CO2 → CO2

Correct Answer:

Option C – SiO2 + CaO →CaSiO3

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