Which among the following compounds is NOT used for the preparation of aromatic carboxylic acids from alkyl…

Which among the following compounds is NOT used for the preparation of aromatic carboxylic acids from alkyl benzene?
  1. Diborane
  2. dilute nitric acid
  3. Alkaline potassium permanganate
  4. Chromic acid

Asked in: MHT CET 2022 (07 Aug Shift 1)

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