Reagent, 1-naphthylamine and sulphanilic acid in acetic acid is used for the detection of :

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$N O_{3}^{-}$

$N_{2} O$

$N O_{2}^{-}$

answer is D.

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Detailed Solution

Acidity 1ml of sodium carbonate extract with acetic acid. Add 2-3 drops of sulphanillic acid solution followed by 2-3 drops of 1-naphtylamine reagent. Appearance of red colour indicate the presence of nitrite ion.

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