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JAMB Chemistry 2004 Question 23

Question 23

Redox Reactions

ZnO(s) + CO(g) → Zn(s) + CO2(g) (heat)
In the reaction above, zinc has been

  1. A.decomposed
  2. B.displaced
  3. C.oxidized
  4. D.reduced
Show the answer and explanation

Answer: D (reduced)

Explanation

Zinc goes from +2 in ZnO to 0 in Zn; it loses oxygen and gains electrons, so it is reduced.