Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule is also considered for classification. In which class of monosaccharide will you place fructose?
To categorise fructose, knowing its molecular formula and the functional group is important as they are categorised on the basis of the number of carbon atoms present in the molecule. The formula being and as it has ketone group present, so it is placed in the class of ketohexoses