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JAMB Chemistry 1990 Question 37

Question 37

Metals and their Compounds

The major component of the slag from the production of iron is

  1. A.an alloy of calcium and iron
  2. B.coke
  3. C.impure iron
  4. D.calcium trioxosilicate (IV).
Show the answer and explanation

Answer: D (calcium trioxosilicate (IV).)

Explanation

In the blast furnace, calcium oxide from limestone reacts with silica impurities to form calcium silicate, CaSiO3 (calcium trioxosilicate(IV)), which is the slag.