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Question on: WAEC Chemistry - 1989

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
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Correct Option: C

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