Question:
Reagent, 1-naphthylamine and sulphanilic acid in acetic acid is used for the detection of
Correct Option: , 4
Solution:
For detection of $\mathrm{NO}_{2}^{-}$, the following test is used. $\mathrm{NO}_{2}^{-}+\mathrm{CH}_{3} \mathrm{COOH} \rightarrow \mathrm{HNO}_{2}+\mathrm{CH}_{3} \mathrm{COO}^{-}$
