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JEE Main levelSingle correct optionDifficulty 2 of 3si029

Phenol and benzoic acid can be distinguished by using

  1. Aaqueous sodium hydrogencarbonate
  2. Baqueous NaOH
  3. Csodium metal
  4. D2,4-DNP

Answer: A

Benzoic acid is stronger than carbonic acid and gives effervescence of with , whereas phenol is weaker and does not. Both dissolve in aqueous NaOH and both release with sodium; neither has a carbonyl group for 2,4-DNP.
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