Which gas is most popular as laughing gas?

Asked in Section Officer(LDCE) 2021 22 2021 · Topic: Sulphur, Nitrogen, Halogen, Inert Gases (Oxides of Nitrogen: Types, preparation, properties, structures, and environmental impact)

1. Sulphur dioxide
2. Hydrogen peroxide
3. Hydrogen sulphide
4. Nitrous oxide

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