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Q.

The test to distinguish C6H5CHO and CH3CHO is

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a

Litmas test  

b

Esterification test

c

Tollens test

d

 Fehlings test  

answer is A.

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Detailed Solution

On heating an aldehyde with Fehling’s reagent, a reddish brown precipitate is obtained. Aldehydes are oxidized to corresponding carboxylate anion. Aromatic aldehydes do not respond to this test.

Hence, C6H5CHO and CH3CHO can be distinguished by Fehling's test.

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