TOLLEN'S AND FEHLING'S TESTS
These two tests are used to identify the aldehydes and to distinguish them from ketones.
Tollen's reagent - silver nitrate + ammonium hydroxide
Aldehydes can reduce Tollen's reagent to metallic siver,which is deposited along the side walls of a test tube forming a silver mirror.(silver mirror test)
Fehling's solution - copper sulphate + sodium potassium tartarate
Aldehydes can reduce Fehling's solution,so that blue cupric ion is reduced red cuprous oxide.
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