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

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Question:

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

  1. $\mathrm{N}_{2} \mathrm{O}$

  2. $\mathrm{NO}_{3}^{-}$

  3. NO

  4. $\mathrm{NO}_{2}^{-}$

Correct Option: , 4

Solution:

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