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JAMB Chemistry 1983 Question 18

Question 18

Metals and their Compounds

In the reaction Fe + Cu2+ → Fe2+ + Cu, iron displaces copper ions to form copper. This is due to the fact that

  1. A.iron is in the metallic form while the copper is in the ionic form
  2. B.the atomic weight of copper is greater than that of iron
  3. C.copper metal has more electrons than iron metal
  4. D.iron is an inert metal
  5. E.iron is higher in the electrochemical series than copper.
Show the answer and explanation

Answer: E (iron is higher in the electrochemical series than copper.)

Explanation

A metal higher in the electrochemical series gives up electrons more readily, so iron reduces Cu2+ ions to copper.