Question

Differentiate between aldehyde and ketone functional groups. How both are identified from each other?

Answer 1

Answer. Aldehyde consists of as functional group. Theirs general formula is RCHO. For example,
  O                 O        
  ║                 ║
H-C-H                H-C-C-H
Form aldehyde         Acetaldehyde

                   C=O

Ketone consists of as functional group having general formula
For example,
                    O   
                    ║
                    Acetaldehyde
Aldehyde is identified by Fehling's solution test. Mix equal volumes of Fehling's solution A and B in a test tube. Add a pinch of organic compound- and boil for five minutes. Red precipitate will be formed.
While ketone is identified by Phenyl hydrazine test. Shake a of the given organic compound with about 2.0 cm3 of phenyl  hydrazine solution. Orange red precipitate will be formed.

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