By which test ethanol and ethanal are distinguished ?
Answers
Answer:
Ethanol also has a higher boiling point than ethanal, and is the kind of alcohol present in commercial drinks. Ethanal, on the other hand, is an aldehyde, which means it has the functional group R-COH.
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Alcohol contains OH group and Aldehyde contains CHO GROUP.
Alcohol on reacting with carboxylic acids undergo esterification reaction where as aldehyde will not undergo .
Aldehydes reduces tollen's reagent where as alcohol does not.
On warming with ammonical silver nitrate solution [tollen reagent ] in alkaline medium , aldehyde gives silver mirror on the side of test tube.
Fehlings Solution test only for Aldehydes:
Fehlings solution is alkaline solution of copper sulphate containing sodium potassium tartarate.Aldehydes gives reddish brown precipitate of Cu2) with Fehling solution.