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O-LevelChemistryMetals & Reactivity5070/12 · Oct/Nov 2019 · Q281 Mark

Iron is extracted from its ore in a blast furnace. Coke and limestone are also added to the blast furnace. What is the purpose of the limestone?

Ato decompose to release oxygen to burn the coke
Bto decompose to release oxygen to oxidise the iron
Cto decompose to neutralise the acidic impurities
Dto react with coke to heat the blast furnace

✓ Correct answer

C: to decompose to neutralise the acidic impurities

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About this question

Topic
Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 28.

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