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Q.

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

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a

NO3−

b

NO

c

N2O

d

NO2−

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.Reaction involved is
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