Which gas is commonly known as 'laughing gas'?

A. Nitrous oxide

B. Nitrogen dioxide

C. Nitric oxide

D. Carbon monoxide

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cpo Save WhatsApp Report

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Answer: A. Nitrous oxide

Answer: (A) Nitrous oxide

Nitrous oxide (N₂O) is called laughing gas and is used as a mild anaesthetic.

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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