This
indicates that the carbonyl group is present as an aldehydic group CHO
(CH
OH)4
(CH
)4
OH
CH2OH
CH2OH
Br water
2
COOH
Gluconic acid
5 Acetylation of glucose with acetic anhydride gives glucose
pentaacetate which confirms the presence of five –OH groups Since
it exists as a stable compound, five –OH groups should be attached
to different carbon atoms