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Chemistry · Oct / Nov 2016 · Paper 12 · Question 3

5070Extraction of metals

Which statement is correct?

  1. ACarbon monoxide reduces sodium oxide to sodium.
  2. BDuring the electrolysis of copper(II) sulfate solution, hydrogen is liberated at the positive electrode.
  3. CRecycling aluminium conserves the Earth's finite supply of haematite.
  4. DIron oxide is reduced to iron in the blast furnace.

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Correct answer: D. Iron oxide is reduced to iron in the blast furnace.

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