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