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Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
Phenol on treating with conc.nitric acid yields 2,4,6-trinitrophenol.This compound is known as picric acid.But the yield was poor so nowdays Phenol is first treated with conc.H2SO4 which forms 2,4-disulphonic acid which is later on treating with conc.HNO3 gives 2,4,6-trinitrophenol i.e picric acid.Thanks & RegardsAarti Guptaaskiitians Faculty
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