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Chemistry · May / June 2024 · Paper 12 · Question 29

5070Extraction of metals

Which reaction takes place in the blast furnace?

  1. AFeCr2O4 + 4C → Fe + 2Cr + 4CO
  2. B3Fe + 4H2O → Fe3O4 + 4H2
  3. CSiO2 + CaO → CaSiO3
  4. DSiO2 + 2NaOH → Na2SiO3 + H2O

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Correct answer: C. SiO2 + CaO → CaSiO3

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