For the identification of β-naphthol using dye test, it is necessary to use
← JEE Advanced 2014 · Paper 2
ChemistrySingle correct+3 / -1Question 27 of 60
JEE Advanced 2014 · Paper 2, Chemistry question 27
Answer and worked solution
Official answer: D
Dye test. Benzenediazonium chloride couples with β-naphthol to give an orange-red azo dye. The coupling partner must be the strongly activated naphthoxide ion, so β-naphthol is dissolved in NaOH. In acidic or neutral solution, or in dichloromethane, coupling does not occur effectively.
(D)