Questions  

For the identification of β-naphthol using dye test, it is necessary to use:

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By Expert Faculty of Sri Chaitanya
a
dichloromethane solution of β,-naphthol
b
acidic solution of β-naphthol
c
neutral solution of  β-naphthol
d
alkaline solution of β-naphthol
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detailed solution

Correct option is D

In an alkaline solution, -OH turns into -O-, which interacts with an azo molecule, such as  PhNN+, to produce an azo colour.
So, D is the right answer.

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