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JAMB Chemistry 1981 Question 5

Question 5

Carbon and its Compounds

When a glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into barium hydroxide. The gas is

  1. A.methane
  2. B.hydrogen chloride
  3. C.hydrogen
  4. D.nitrogen
  5. E.carbondioxide
Show the answer and explanation

Answer: E (carbondioxide)

Explanation

Carbon dioxide does not support burning, so it puts out the splint, and it reacts with barium hydroxide to form a white precipitate of barium carbonate.