Compare the dipole moments () of Acetaldehyde and Acetone. Which of the following statements is true — Aldehydes Ketones and Carboxylic Acids Chemistry Question

💡 Solution & Explanation

Alkyl groups are electron-donating ($+I$ effect). Acetone has two methyl groups, which push electron density towards the carbonyl carbon, increasing the polarization of the $C=O$ bond more than the single methyl group in acetaldehyde. Hence, Acetone's dipole moment ($2.9$ D) is higher than Acetaldehyde's ($2.7$ D).