A single organic compound exhibits positive results for both Tollens' test and Fehling's test. Which — Aldehydes Ketones and Carboxylic Acids Chemistry Question

💡 Solution & Explanation

Aliphatic aldehydes (like acetaldehyde) give both tests. Formic acid has an aldehyde-like hydrogen and gives both tests. Terminal $\alpha$ -hydroxy ketones (like acetoin) can easily tautomerize or be oxidized, yielding positive results for both Tollens' and Fehling's. Aromatic aldehydes (Benzaldehyde) fail Fehling's test.