Weegy: Add Fehling solution. No reaction with alkanone(Ketone). With alkanal ( aldehyde), there is oxidation to carboxylic acid, Cu2+ in fehling solution is therefore reduced to Cu+. [ Observation : colour change from blue to red.
or Silver Mirror test
Add Tollens reagent. Silver mirror on test tube surface with alkanal but no reaction with alkonone.
This is because aldehyde are oxidised and silver ions are reduced to silver metal solid which ... (More)