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JAMB Chemistry 2013 Question 24

Question 24

Electrolysis

In an electrochemical cell, polarization is caused by

  1. A.chlorine.
  2. B.oxygen.
  3. C.tetaoxosulphate(VI) acid.
  4. D.hydrogen.
Show the answer and explanation

Answer: D (hydrogen.)

Explanation

Bubbles of hydrogen collect on the positive electrode of a simple cell and reduce its voltage; this is polarization.