Question #acf82

1 Answer
Harsh Gupta
Aug 11, 2015

yes the test holds true

Explanation:

as far as i know that in fehling solution ion is in +2 oxidation state . it gets reduced to +1 thus it oxidises the aldehyde to acid .

image of the complex

the oxygen(-1) is in resonance with double bonded oxygen.
copper valency is full but it will surely oxidise the complex as all cu+2 don't form complex . (about 0.01%)

yes the test holds true because the reaction completes to 99.99% . so no doubt of the test failing.
REMEMBER THIS TEST IS MAINLY FOR SUGARS AND ALDEHYDES

if u oxidise aromatic aldehyde then there are chances of the compound loosing its aromaticity so aromatic compounds don't generally give fehling solution test

  • i am myself a student . if anyone wants to add or correct the answer he /she are requested to do so and let me know my mistake
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