Aromatic aldehydes (such as benzaldehyde) can be distinguished chemically from aliphatic aldehydes ( — Aldehydes Ketones and Carboxylic Acids Chemistry Question
Question
Aromatic aldehydes (such as benzaldehyde) can be distinguished chemically from aliphatic aldehydes (such as acetaldehyde) because aromatic aldehydes fail to give a positive result with:
Answer: B
💡 Solution & Explanation
Aromatic aldehydes give a silver mirror with Tollens' reagent but fail to reduce the weaker $Cu^{2+}$ oxidants found in Fehling's and Benedict's solutions due to resonance stabilization of the aromatic carbonyl.
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