Extraction of Iron
TYPICAL STRUCTURED/ ESSAY QUESTIONS
Question: Describe with the aid of equations the essential reactions in the extraction of iron.
1) Iron ore (haematite), coke and limestone are added to a blastfurnace.
2) Coke reacts with the air to form carbon dioxide.
3) Coke reacts with more carbon dioxide to form carbon monoxide.
4) Carbon monoxide reacts with iron ore to form iron and carbon dioxide gas.
5) Limestone decomposes to form calcium oxide and carbon dioxide.
6) Calcium oxide reacts with silicn dioxide to form slag.
Typical questions associating with extraction of iron:
(a) Name of the iron ore = haematite
(b) Why is limestone used in the extraction = to remove impurities ( acidic oxide, silicon dioxide )
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Note:the extraction of metal depends on the reactivity of the metal.
Electrolysis of molten chlorides
Potassium, Sodium, Calcium, Magnesium, Aluminum
Heating with carbon
Zinc, Iron, Lead, Coppper
Uncombined in the ground
Silver, Gold, Platinum
