Q142 / 200 · MHT CET - Medical 2026 (26 April Shift 1) · Chemistry
Base catalyzed aldol condensation occurs with
- A2,2-dimethyl propanal
- Correct answerBPropanal
- CBenzaldehyde
- D2,2-dimethyl propenal and Benzaldehyde
Solution
Aldol condensation is given by aldehydes and ketones that contain at least one $\alpha$-hydrogen atom.
In 2,2-dimethyl propanal, the $\alpha$-carbon is attached to three methyl groups and has no $\alpha$-hydrogen.
In benzaldehyde, the $\alpha$-carbon is part of the benzene ring and has no $\alpha$-hydrogen.
In propanal ($CH_3-CH_2-CHO$), the $\alpha$-carbon has two $\alpha$-hydrogen atoms. Therefore, it undergoes base-catalyzed aldol condensation.
Answer: Propanal
In 2,2-dimethyl propanal, the $\alpha$-carbon is attached to three methyl groups and has no $\alpha$-hydrogen.
In benzaldehyde, the $\alpha$-carbon is part of the benzene ring and has no $\alpha$-hydrogen.
In propanal ($CH_3-CH_2-CHO$), the $\alpha$-carbon has two $\alpha$-hydrogen atoms. Therefore, it undergoes base-catalyzed aldol condensation.
Answer: Propanal
Hence, the correct answer is option: 'B'.