The UV spectrum of p-nitrophenol in aqueous solution is shown in Fig. P18.59 (spectrum
Chapter 18, Problem 18.59(choose chapter or problem)
The UV spectrum of p-nitrophenol in aqueous solution is shown in Fig. P18.59 (spectrum A). When a few drops of concentrated NaOH are added, the solution turns yellow and the spectrum changes (spectrum B). On addition of a few drops of concentrated acid, the color disappears and spectrum A is restored. Explain these observations.
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