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Chemistry · May / June 2018 · Paper 12 · Question 32

5070Extraction of metals

Iron is obtained in the blast furnace from the ore haematite. Which process takes place in the blast furnace?

  1. ACalcium carbonate is used to remove acidic impurities.
  2. BCoke is reduced to carbon dioxide.
  3. CHaematite is oxidised by carbon monoxide.
  4. DHaematite undergoes thermal decomposition.

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Correct answer: A. Calcium carbonate is used to remove acidic impurities.

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