Define fehlings test A&B

Dear Student,

The Fehling’s test is a test which is used to distinguish between aldehydes and ketones. It is a mild oxidizing agent which oxidizes aldehydes but not ketones. Therefore, ketones do not give this test. The general equation for this reaction is written as follows

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The Fehling solution has two components–

Fehling solution A and Fehling solution B. Fehling solution A is Copper sulphate solution and Fehling solution B is Sodium Potassium tartarate (also known as Rochelle salt). When a few drops of the Fehling's solution are added to the Aldehyde in a test tube and it is gently heated, a red coloured precipitate of Cu2O is formed.

Hope this information clears your doubts about topic.

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Regards

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