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WAEC - Chemistry (1989 - No. 5)
The earthly impurities in iron ore are removed in the blast furnace by the reaction
CO
2
+ C →2CO
Fe
2
O
3
+ 3CO →2Fe + 3CO
2
SiO
2
+ CaO →CaSiO
3
CaCO
3
→ CaO + CO
2
C +CO
2
→ CO
2
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