Which of the following is known as laughing gas?

Nitrous oxide (N2O) is a chemical compound commonly known as laughing gas. It is a colorless, non-flammable gas with a slightly sweet odor and taste. It earned its nickname because it induces a state of euphoria and mild hallucinations when inhaled, often leading to laughter.

• Medical Use: It is widely used in dentistry and surgery as an anesthetic and analgesic (pain reliever).
• Environmental Impact: It is a potent greenhouse gas and a major regulator of stratospheric ozone.
• Other Options: Chlorofluorocarbons (CFCs) are synthetic chemicals used in refrigeration; Ammonia (NH3) is a pungent gas used in fertilizers; Carbon Monoxide (CO) is a toxic gas resulting from incomplete combustion of carbon-based fuels.