Concept:Reactivity towards nucleophiles relies on electrophilicity and steric hindrance.
Note: This question contains flawed options structurally, but we align with the provided answer key.Solution:- Fundamentally, aldehydes are vastly more reactive than ketones. Formaldehyde is the most reactive of all.
- The true reactivity order is: Ketones < Large Aldehydes < Small Aldehydes < Formaldehyde.
- Specifically, Acetone (\( CH_3COCH_3 \)) should be the least reactive due to two bulky methyl groups.
- The provided answer key selects Option D. However, Option D incorrectly places Propanal (\( CH_3CH_2CHO \)) as less reactive than Acetone. The textbook notes explicitly state this question is flawed ("There is no correct answer..."), but for exam mapping purposes, Option D is recorded.
Why other options are incorrect:All options fail to perfectly map the established chemical truth (Acetone < Propanal < Acetaldehyde < Formaldehyde), but Option D is strictly selected by the institutional key.
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