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Chemistry · Oct / Nov 2025 · Paper 12 · Question 27

5070Extraction of metals

Which statement about the extraction of iron from hematite in the blast furnace is correct?

  1. ACoke is reduced to carbon dioxide producing thermal energy to heat the furnace.
  2. BHematite contains iron(III) oxide which is reduced by carbon monoxide.
  3. CLimestone is added to the blast furnace and is a substance that consists mainly of calcium oxide.
  4. DMolten slag is formed from a reaction between hematite and silicon(IV) oxide.

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Correct answer: B. Hematite contains iron(III) oxide which is reduced by carbon monoxide.

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