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JEE Main levelOne or more correct optionsDifficulty 2 of 3nc158

Which of the following reactions of aniline are correct?

  1. AWith bromine water it gives a white precipitate of 2,4,6-tribromoaniline.
  2. BWith and ethanolic on warming it gives phenyl isocyanide.
  3. CWith it gives a sulfonamide that is soluble in aqueous alkali.
  4. DWith / dil. at 273-278 K it gives a yellow oil of N-nitrosoaniline.

Answer: A, B, C

Aniline is a primary aromatic amine, so it gives tribromoaniline, the carbylamine test (foul-smelling phenyl isocyanide) and an alkali-soluble sulfonamide in the Hinsberg test. With nitrous acid at 273-278 K it gives benzenediazonium chloride, not a yellow N-nitrosoamine (that is formed from secondary amines).
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