The chemical formula of laughing gas is :

Asked in Rakshak 2023 · Topic: Sulphur, Nitrogen, Halogen, Inert Gases (Oxides of Nitrogen: Types, preparation, properties, structures, and environmental impact)

1. NH$_{3}$
2. NO$_{2}$
3. N$_{2}$O
4. N$_{2}$O$_{2}$

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