Biology PYQ 388 of 399 · Biology in Everyday Life & Applied Biology

The laughing gas used by doctors as an anaesthesia is -

  1. ANitrogen
  2. BNitrogen oxide
  3. CNitrous oxide
  4. DNitrogen dioxide

44th BPSC Prelims 2000

Show answer and explanation

Correct answer: (c) Nitrous oxide

Explanation

The laughing gas used by doctors as a mild anaesthetic is nitrous oxide (N₂O), a colourless gas with a slightly sweet smell. It is given with oxygen, for example in dentistry.

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