Chemistry · May / June 2020 · Paper 11 · Question 28
The equations show reactions taking place in the blast furnace. In which reaction is an acidic impurity, present in iron ore, removed?
- AC + O2 → CO2
- BC + CO2 → 2CO
- CFe2O3 + 3CO → 2Fe + 3CO2
- DCaCO3 + SiO2 → CaSiO3 + CO2
As printed in the paper
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Correct answer: D. CaCO3 + SiO2 → CaSiO3 + CO2
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