JEE Advanced 2022 Chemistry question
Match the compounds in LIST-I with the observations in LIST-II, and choose the correct option. LIST-I (I) Aniline (II) -Cresol (III) Cysteine (IV) Caprolactam LIST-II (P) Sodium fusion extract of the compound on boiling with , followed by acidification with conc. , gives Prussian blue color. (Q) Sodium fusion extract of the compound on treatment with sodium nitroprusside gives blood red color. (R) Addition of the compound to a saturated solution of results in effervescence. (S) The compound reacts with bromine water to give a white precipitate. (T) Treating the compound with neutral solution produces violet color.
Solution
(I) Aniline contains N (Lassaigne's test for nitrogen – Prussian blue, P) and gives a white precipitate of 2,4,6-tribromoaniline with bromine water (S); it has no sulfur, so not Q. (II) o-Cresol is a phenol: violet colour with neutral (T); it contains no nitrogen and is too weakly acidic to liberate
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