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O-LevelChemistryMetals & Reactivity5070/11 · May/June 2020 · Q281 Mark

The equations show reactions taking place in the blast furnace. In which reaction is an acidic impurity, present in iron ore, removed?

A+ O2 → CO2
B+ CO2 → 2CO
CFe2O3 + 3CO → 2Fe + 3CO2
DCaCO3 + SiO2 → CaSiO3 + CO2

✓ Correct answer

D: CaCO3 + SiO2 → CaSiO3 + CO2

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About this question

Topic
Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2020 Paper 1 Variant 1, question 28.

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