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JAMB Chemistry 1992 Question 19

Question 19

Electrolysis

Arrange HCl, CH3COOH, C6H5CH3 in order of increasing conductivity.

  1. A.HCl, CH3COOH, C6H5CH3
  2. B.C6H5CH3, HCl, CH3COOH
  3. C.C6H5CH3, CH3COOH, HCl
  4. D.CH3COOH, C6H5CH3, HCl.
Show the answer and explanation

Answer: C (C6H5CH3, CH3COOH, HCl)

Explanation

Methylbenzene is a non-electrolyte (no ions), ethanoic acid is a weak electrolyte (few ions) and HCl is a strong electrolyte (fully ionised).