JAMB Chemistry 1986 Question 39

Question 39

Qualitative Analysis

Which of the following compounds would give lilac flame coloration and a white precipitate with acidified barium chloride solution?

  1. A.KCl
  2. B.NaNO3
  3. C.K2SO4
  4. D.CaSO4.
Show the answer and explanation

Answer: C (K2SO4)

Explanation

A lilac flame shows potassium, and a white precipitate with acidified BaCl2 shows sulphate. So the compound is K2SO4.