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MHT CET202616 April 2026Evening ShiftChemistryAldehydes and KetonesActual

Acetone on heating with CrO ₃ mainly forms,

Options

  1. AAcetic acid
  2. BEthyl alcohol
  3. CToluene
  4. DDimethyl ether

Correct answer

A. Acetic acid

Step-by-step solution

Ketones are generally resistant to oxidation under normal conditions. However, on vigorous heating with strong oxidizing agents like CrO ₃ , they undergo cleavage of the C-C bond to form carboxylic acids with fewer carbon atoms. Acetone ( CH ₃ COCH ₃ ) undergoes oxidation to form a two-carbon carboxylic acid and a one-carbon fragment which further oxidizes to carbon dioxide and water. CH ₃ COCH ₃ CrO ₃, CH ₃ COOH + CO ₂ + H ₂ O The main product formed is acetic acid. Answer: Acetic acid

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