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JAMB Chemistry 2006 Question 2

Question 2

Halogens

In the diagram above, gas X is

Diagram for this question
  1. A.hydrogen
  2. B.chlorine
  3. C.oxygen
  4. D.hydrogen chloride
Show the answer and explanation

Answer: C (oxygen)

Explanation

In sunlight chlorine water decomposes: 2HOCl → 2HCl + O2, so the gas collected is oxygen.