Anam Fatma posted an Question
September 01, 2021 • 23:58 pm 20 points
  • IIT JAM
  • Biotechnology (BT)

Phenol, when it first reacts with concentrated sulphuric acid and then wit concentrated nitric acid, gives a. 2,4,6-trinitrobenzene b. o-nitrophenol c. p-nitrop

Phenol, when it first reacts with concentrated sulphuric acid and then wit concentrated nitric acid, gives A. 2,4,6-trinitrobenzene B. O-nitrophenol C. P-nitrophenol D. Nitrobenzen

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  • Priya sarda best-answer

    Phenol reacts with sulfuric acid giving substituted phenols. At room temperature an equilibrium is established between a mixture of phenol sulphuric acid and the product benzene ortho hydroxy sulfuric acid. And then the product benzene ortho hydroxy sulfuric acid reacts with concentrated nitric acid, Phenol on reaction with conc. H2SO4 gives a mixture of o- and p- products and then at room temperature o- product is more stable, which on treatment with conc. HNO3 will yield o-nitrophenol. Since temperature is not mentioned, o-nitrophenol is the only stable product. When benzene ortho hydroxy sulfuric acid reacts with concentrated nitric acid ortho-nitrophenol is formed.

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