What is the difference between Tollens' test and Fehling's test?
Both detect aldehydes: Tollens' gives a silver mirror, Fehling's gives a red-brown Cu₂O precipitate — ketones give a negative result in both.
Both detect aldehydes: Tollens' gives a silver mirror, Fehling's gives a red-brown Cu₂O precipitate — ketones give a negative result in both. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
Tollens' test vs Fehling's test
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