Correct Answer:
A. Nitrous Oxide
The term "laughing gas" refers to a specific chemical compound known for its anesthetic and analgesic properties, often used in medical and dental procedures to reduce pain and anxiety. It can also induce a state of euphoria, hence its common name.
- The correct answer is Nitrous Oxide (N2O). This compound is a colorless, non-flammable gas that has been used for over a century in various medical applications.
- Option B, Sulfur Oxide (SOx), refers to a group of compounds, often pollutants, and is not laughing gas.
- Option C, Carbon Dioxide (CO2), is a common greenhouse gas essential for life but has no euphoric or anesthetic properties like laughing gas.
- Option D, "None," is incorrect because Nitrous Oxide is indeed the correct answer.
Understanding common chemical names is important in general knowledge.