MCQ
The lightest gas which is non$-$inflammable is:
  • A
    $H_2$
  • $He$
  • C
    $N_2$
  • D
    $Ar$

Answer

Correct option: B.
$He$
$H_2$​ is the lightest gas but it is inflammable.
$He$ is the next lightest gas and it is non$-$inflammable.

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