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Question

C2H5CHO and CH3COCH3 can be distinguished from one another by testing with :

A
phenyl hydrazine
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B
2,4-dinitrophenyl hydrazine
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C
Fehling's solution
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D
sodium bisulphite
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Solution

The correct option is C Fehling's solution
Fehling's solution differentiates aldehydes from ketones because it reacts with an aldehyde, but not with ketones.

The compound to be tested is added to the Fehling's solution and the mixture is heated. Aldehydes are oxidized, giving a positive result, but ketones do not react unless they are α-hydroxy ketones

With the other three options, both aldehyde and ketones react in a similar way.

Hence, option C is correct.

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