nitrous oxide

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nitrous oxide (dinitrogen oxide) Colourless gas (N2O) that is used as an anaesthetic or analgesic during surgical or dental operations. It is known as ‘laughing gas’ since it produces exhilaration. It is also used in making pressurized foods. It is also used in making pressurized foods. It was first prepared in 1772 by English chemist Joseph Priestley.

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