Multiple choice general knowledge science & technology

Formula of "laughing gas" ?

  1. NO2

  2. N2O

  3. NO

  4. HN2O
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrous oxide (N2O) is commonly known as "laughing gas" because it causes euphoria and laughter when inhaled, and has been used as an anesthetic since the 18th century. NO2 is nitrogen dioxide (a toxic gas), NO is nitric oxide, and HN2O is not a valid chemical formula.

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