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JAMB Chemistry 1995 Question 38

Question 38

Metals and their Compounds

In the extraction of iron in the blast furnace, limestone is used to

  1. A.release CO2 for the reaction
  2. B.reduce the iron ore
  3. C.increase the strength of the iron
  4. D.remove impurities
Show the answer and explanation

Answer: D (remove impurities)

Explanation

Limestone decomposes to CaO, which combines with the sandy impurities (SiO2) to form molten slag (CaSiO3) that is run off.