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JAMB Chemistry 2021 Question 16

Question 16

Qualitative Analysis

The solution that will give a white precipitate with Barium chloride solution and a green flame test is

  1. A.Na2SO4
  2. B.CaSO4
  3. C.CuSO4
  4. D.(NH4)2SO4
Show the answer and explanation

Answer: C (CuSO4)

Explanation

A white precipitate with BaCl2 (BaSO4) shows sulphate; a green (blue-green) flame shows copper. So the salt is CuSO4.