Question 50
MediumOriginal questionWhich gas is known as laughing gas and was one of the first anaesthetics used in dentistry?
Show the answer and explanation
CorrectNot quiteAnswer A
Correct answer: A
Explanation
Nitrous oxide, N₂O, causes a light-headed, cheerful feeling when breathed in, hence the name.
Worth noting
Nitrogen dioxide, NO₂, is a brown, poisonous air pollutant; the formulas differ by one letter.
- Concept
- Nitrous oxide
- Typical timeTypical
- 60 s
- Your timeYours
- —
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