Aromatic Compounds Containing Nitrogen - Result Question 20
####20. Amongst the compounds given, the one that would form a brilliant coloured dye on treatment with $NaNO _2$ in dil. $HCl$ followed by addition to an alkaline solution of $\beta$-naphthol is
(a)
(c)
(b)
(d)
(2011)
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Answer:
Correct Answer: 20. (d)
Solution:
- As we know, benzenediazonium salt forms brilliant coloured dye with $\beta$-naphthol, the compound under consideration must be $p$-toluidine (c) as it is a primary aromatic amine. Primary aromatic amine, on treatment with $NaNO _2$ in dil. $HCl$ forms the corresponding diazonium chloride salt.
