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JAMB Chemistry 1994 Question 38

Question 38

Electrolysis

In an electrolytic set-up to protect iron from corrosion, the iron is

  1. A.made the cathode
  2. B.made the anode
  3. C.used with a metal of lower electropositive potential
  4. D.initially coated with tin
Show the answer and explanation

Answer: A (made the cathode)

Explanation

Corrosion is oxidation, which happens at the anode. Making the iron the cathode supplies it with electrons so it cannot be oxidized.