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JAMB Chemistry 2009 Question 12

Question 12

Air

The mixture of gases used in a photographer's flash tube is

  1. A.argon and krypton
  2. B.krypton and xenon
  3. C.helium and argon
  4. D.argon and xenon
Show the answer and explanation

Answer: B (krypton and xenon)

Explanation

Photographic flash tubes are filled with the heavier noble gases krypton and xenon, which give an intense white flash.