Laughing-gas is the name given to

(a) Nitrous oxide
(b) Nitric oxide
(c) Nitrogen trioxide
(d) Nitrogen dioxide

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2 Answer(s)

a

sushil Default Answered on 4th May 2016.
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Answer: (a) Nitrous Oxide 

Anurag Mishra Professor Answered on 5th July 2016.
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