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JEE Main levelSingle correct optionDifficulty 2 of 3ro026

On Birch reduction (Na, liquid , ethanol), the substituent of which compound ends up on an sp3 carbon of the product ring?

  1. Atoluene
  2. Banisole
  3. CN,N-dimethylaniline
  4. Dbenzoic acid

Answer: D

Electron-donating groups (, , ) remain on the double bonds. Electron-withdrawing is found on a saturated carbon.
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