Statement 1 Aniline on reaction with NaNO ₂ / HCl at 0^ C followed by coupling with -naphthol gives a dark coloured precipitate. Statement 2 The colour of the compound formed in the reaction of aniline with NaNO ₂ / HCl at 0^ C followed by coupling with -naphthol is due to the extended conjugation.

Step-by-step solution

Statement II is correct. Statement I appears correct in the light of Statement II. What is the colour of a dye that dye is not in included in JEE syllabus but what is the cause and understanding behind a colour could be essentially expected. Concept Usually a certain proportion of the flight is absorbed and the rest reflected, the substance has the colour of the reflected light. If only a single band is absorbed, the substance has the complementary colour. - The wavelength of photon absorbed depends on the energy d