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JEE Main levelSingle correct optionDifficulty 2 of 3nm128

In naphthalene, the alpha positions and the compound $β$ -naphthol are respectively

Apositions 2, 3, 6, 7; naphthalen-2-ol
Bpositions 1, 4, 5, 8; naphthalen-2-ol
Cpositions 2, 3, 6, 7; naphthalen-1-ol
Dpositions 1, 4, 5, 8; naphthalen-1-ol

Answer: B

In naphthalene the carbons next to the ring-fusion atoms (1, 4, 5, 8) are alpha and the remaining ones (2, 3, 6, 7) are beta.

β

-Naphthol has the OH on a beta carbon, so it is naphthalen-2-ol.

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