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JAMB Chemistry 1983 Question 13

Question 13

Halogens

In the above experiment (Fig. 1) the litmus paper will initially

Diagram for this question
  1. A.be bleached
  2. B.turn green
  3. C.turn red
  4. D.turn blue
  5. E.turn black
Show the answer and explanation

Answer: D (turn blue)

Explanation

Heated ammonium chloride splits into ammonia and hydrogen chloride. Ammonia is lighter, so it diffuses through the porous plug faster and turns the damp litmus blue first.