COMEDK20269 May 2026Evening ShiftChemistryAldehydes and KetonesActual
Which one of the following is the correct statement?
Options
- AAcetone undergoes reaction in presence of Ba(OH)₂ on heating to form 4–Methylpent–3–en–2–one
- BAcetophenone cannot be prepared on reacting Benzoyl chloride with Dimethyl cadmium in ether solvent
- CAcetophenone on reaction with I₂ / Na₂ CO₃ (aq) does not undergo any reaction due to the presence of deactivat
- DAcetone reacts with NH₂- NH₂ / KOH in Glycol on heating to form the saturated hydrocarbon, Butane
Correct answer
A. Acetone undergoes reaction in presence of Ba(OH)₂ on heating to form 4–Methylpent–3–en–2–one
Step-by-step solution
Acetone (C H₃ COCH₃ ) undergoes aldol condensation in the presence of a base like Ba(OH)₂ . Two molecules of acetone condense to form diacetone alcohol, which upon heating loses a water molecule to form an , -unsaturated ketone. 2 CH₃ COCH₃ Ba(OH) ₂ (CH₃ )₂ C(OH)CH₂ COCH₃ (CH₃ )₂ C=CHCOCH₃ + H₂ O The IUPAC name of the product (CH₃ )₂ C=CHCOCH₃ is 4-Methylpent-3-en-2-one (commonly known as mesityl oxide). Thus, statement (A) is correct. For the other options: Statement (B) is incorrect because acetophenone (PhCOCH₃