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JAMB Chemistry 2012 Question 26

Question 26

Electrolysis

A metal M displaces zinc from ZnCl2 solution. This shows that

  1. A.electrons flow from zinc to M
  2. B.M is more electropositive than zinc
  3. C.M is more electonegative than zinc
  4. D.zinc is more electropositive than M.
Show the answer and explanation

Answer: B (M is more electropositive than zinc)

Explanation

A metal can only displace another from its salt if it is higher in the activity series, i.e. more electropositive.