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O-LevelChemistryMetals & Reactivity5070/11 · Oct/Nov 2020 · Q311 Mark

Iron is extracted from haematite in a blast furnace. Coke and limestone are added to the blast furnace. What is the function of the limestone?

AIt decomposes and neutralises acidic impurities.
BIt is a fuel which heats the furnace.
CIt oxidises the iron in haematite.
DIt releases oxygen allowing the coke to burn.

✓ Correct answer

A: It decomposes and neutralises 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 2020 Paper 1 Variant 1, question 31.

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