JEE Main202431 Jan 2024Evening ShiftChemistryCarboxylic Acid DerivativesActual

The azo-dye Y formed in the following reactions is Sulphanilic acid + NaNO 2 + CH 3 COOH → X

Correct answer

Step-by-step solution

Reaction of aniline sulphonic acid with NaNO 2 + CH 3 COOH gives diazo ester sulphonic acid. Which on further treatment with naphthalene derivative undergoes diazo coupling reaction to give red azo dye. This is known as Griess-Ilosvay test.

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