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.