Question
Which of the following reagents will be useful to distinguish between
Which of the following reagents will be useful to distinguish between 
and 
A.
Dilute $$HCl$$
B.
\[{{C}_{6}}{{H}_{5}}S{{O}_{2}}\] and \[O{{H}^{-}}/{{H}_{2}}O\]
C.
$$HONO$$ then \[\beta \] - naphthol
D.
\[AgN{{O}_{3}}\] in \[{{H}_{2}}O\]
Answer :
$$HONO$$ then \[\beta \] - naphthol
Solution :
The first compound will give azo dye
The first compound will give azo dye