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JAMB Chemistry 1983 Question 32

Question 32

Metals and their Compounds

Some metals are extracted from their ores after some preliminary treatments by electrolysis (L), some by thermal reaction (T) and some by a combination of both processes (TL). Which set-up in the following for the extraction of iron, copper and aluminium is correct?

  1. A.Iron (L), copper (L), aluminium (T).
  2. B.Iron (T), copper (L), aluminium (T).
  3. C.Iron (TL), copper (TL), aluminium (TL).
  4. D.Iron (L), copper (T), aluminium (T)
  5. E.Iron (T), copper (L), aluminium (TL).
Show the answer and explanation

Answer: E (Iron (T), copper (L), aluminium (TL).)

Explanation

Iron is extracted thermally in the blast furnace; copper is purified by electrolysis; aluminium needs bauxite to be purified (heated) to alumina and then electrolysed.