Discussion Forum



1)

For the identification of   $\beta$- naphthol using dye test, it is necessary to use


A) dichloromethane solution of $\beta$-naphthol

B) acidic solution of $\beta$-naphthol

C) neutral solution of $\beta$-naphthol

D) alkaline solution of $\beta$-naphthol

Answer:

Option D

Explanation:

 Plan    This problem can be solved by using the concept of synthesis of dye using electrophilic aromatic substitution reaction.

  In basic (alkaline) solution naphthol exists as naphthoxide ion which is a strong o, p -directing group.

273202117_p6.JPG

Thus, formation  of dye can be shown as

2732021609_p7.JPG

  Thus (d) is the correct choice