Multiple choice

The chemical name of laughing gas is

  1. calcium sulphate

  2. nitrous oxide

  3. hydrogen peroxide

  4. carbon monoxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrous oxide (N2O) is commonly called 'laughing gas' because it induces euphoria and laughter when inhaled. It was discovered by Joseph Priestley in 1772 and is used as an anesthetic and in food preparation (whipped cream dispensers).

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