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Railways PYQCBT 1 2016

RRB NTPC · Question 39

Which of the following gases is not inert gas? A. Helium B. Neon C. Radon D. Hydrogen

  1. A

  2. C

  3. B

  4. D

Show answer & explanation

Answer: (D) D

Explanation

Helium, neon and radon are noble (inert) gases of group 18. Hydrogen is a reactive gas, not an inert gas.