explain fehling's test and tollen's test of carbonyl compounds
The oxidation of aldehydes can be performed with a mild oxidizing agent, such as Ag+ in
ammonia solution used in the Tollens test or Cu2+ in alkaline solution used in Fehling's test. If
the Tollens test is performed in a scrupulously clean glass vessel, the silver metal is plated on the
walls of the glass to form a silver mirror. Fehling's reagent is a deep blue Cu2+ solution that
forms a brick-red precipitate of Cu2O in the presence of aldehydes.