The reagent that can distinguish benzaldehyde | vedclass

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Question

(B) Benzaldehyde $(C_6H_5CHO)$ is an aromatic aldehyde,while propionaldehyde $(CH_3CH_2CHO)$ is an aliphatic aldehyde.Fehling's solution is a mild oxi

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Fehling's solution

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(B) Benzaldehyde $(C_6H_5CHO)$ is an aromatic aldehyde,while propionaldehyde $(CH_3CH_2CHO)$ is an aliphatic aldehyde.Fehling's solution is a mild oxidizing agent that can oxidize aliphatic aldehydes to carboxylic acids but cannot oxidize aromatic aldehydes like benzaldehyde.Therefore,propionaldehyde gives a positive test (red precipitate of $Cu_2O$) with Fehling's solution,whereas benzaldehyde does not.Tollens reagent reacts with both aliphatic and aromatic aldehydes,and $2, 4-DNP$ reacts with all aldehydes and ketones,so they cannot distinguish between the two.

The reagent that can distinguish benzaldehyde from propionaldehyde is

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