Which of the following gases is commonly known as laughing gas?

Options :
  1. Carbon dioxide
  2. Sulphur dioxide
  3. Nitrous oxide
  4. Carbon monoxide

Answer and Explanation :-

Answer: Option 3


Laughing gas is nitrous oxide, N2O (more properly called Dinitrogen monoxide). It is a colourless gas with a sweet odour and taste. Inhalation leads to disorientation, euphoria, numbness, loss of motor coordination, dizziness, and ultimately a loss of consciousness. The gas is used as an anaesthetic, as a propellant in whipped cream cans, and as an oxidizing agent in racing cars.

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