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JAMB Physics 1993 Question 36

Question 36

Current Electricity

A simple cell with mercury-amalgamated zinc electrode prevents

  1. A.local action
  2. B.polarization
  3. C.buckling
  4. D.degradation.
Show the answer and explanation

Answer: A (local action)

Explanation

Impurities in ordinary zinc form tiny cells that eat away the zinc (local action); coating the zinc with mercury stops this.