Which of the following aldehydes give red precipitate with Fehling solution.

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p-Salicylaldehyde

Acetaldehyde

formaldehyde

Benzaldehyde

answer is C.

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Detailed Solution

Fehling solution is formed when sodium tartrate added to copper sulphate solution. Only aliphatic aldehydes gives Fehling solution by the formation of red precipitate of Cu₂O. Among the given options, only acetaldehyde is an aliphatic aldehyde that gives Fehling solution test.

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