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The reddish brown precipitate formed in ...

The reddish brown precipitate formed in the Fehling test for aldehydes (RCHO) is due to the formation of

A

Cu

B

`Cu_2O`

C

CuO

D

`(RCOO)_2Cu`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset((A))(CuSO_4)+underset((B))(2NaOH) rarr Cu(OH)_2+Na_2SO_4`
`Cu(OH)_2 overset("Rochell salt")to underset("reagent)")underset("(Fehing's")underset("oxide")underset("Cuprous")(CuO)+H_2O`
`R-overset(O)overset(|)C-H+2CuO underset("bath")overset("Water")to R-overset(O)overset(||)C-OH+underset("((Brick Red ppt.)")underset("oxide")underset("Cuprous")(Cu_2O)`
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