The carbonyl compound that does not undergo aldol condensation is

• A

  acetone
• B

  dichloro acetaldehyde
• Correct answer
  C

  trichloro acetaldehyde
• D

  acetaldehyde

Solution

Any carbonyl compound having $\alpha$-hydrogen will undergo aldol condensation. In

there is no $\alpha$-hydrogen on trichloro acetaldehyde and hence, it will not show aldol condensation reaction.

Hence, the correct answer is option: 'C'.