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sourabh monga Grade: 12
        

why benzaldehyde do not respond to fehling's test?

7 years ago

Answers : (2)

Vikas V
19 Points
										

Benzaldehyde is a mixture of equal volumes of 2 solutions namely, Fehling solution A and Fehling solution B.


Fehling solution A consists of CuSO4 solution


Fehling solution B consists of NaOH+Roschelle's salt..


Benzaldehyde easily reacts with this NaOH in rochelle's salt instead of reacting with CuSO4 .. Hence Benzaldehyde doesnt react with fehling solution..


 


Extra: Rochelle's salt is sodium potassium tartate..


structure:    COONa


                    |


             H--- C --OH


                   |


          OH--- C -- H


                   |


                  COOK

7 years ago
Harita
11 Points
										Aromatic compounds don`t give enols. One of them is benzaldehyde. The reason behind this is it don`t give fehling `s test as it don`t have alpha hydrogen.
										
6 months ago
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