Give a simple chemical test to distinguish between propanal and propanone.
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Solution and Explanation
Propanal (Aldehyde): On treatment with Tollens' reagent (ammoniacal silver nitrate), aldehydes reduce the silver ions to metallic silver, forming a silver mirror on the inner surface of the test tube.
Propanone (Ketone): Ketones do not react with Tollens' reagent and hence do not produce the silver mirror.
Thus, the Tollens' test can distinguish between an aldehyde and a ketone.
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