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JEE Main levelSingle correct optionDifficulty 2 of 3nc209

Benzenediazonium chloride is added to an alkaline solution of 2-naphthol. The red-orange dye formed is

  1. A1-(phenylazo)-2-naphthol (1-phenyldiazenylnaphthalen-2-ol)
  2. B3-(phenylazo)-2-naphthol
  3. C6-(phenylazo)-2-naphthol
  4. D2-(phenylazo)-1-naphthol

Answer: A

In 2-naphthol the position 1 (alpha, adjacent to the C-OH) is the most reactive towards electrophiles, so coupling occurs there and gives 1-(phenylazo)-2-naphthol.
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