Read the following statements and choose the correct answer.
(i) All monosaccharides are reducing sugars.
(ii) All monosaccharides are non-reducing sugars.
(iii) In disaccharides if aldehydic or ketonic groups are bonded, these are non-reducing sugars.
(iv) In disaccharides if aldehydic or ketonic groups are free, these are reducing sugars.
Text Solution
Verified by ExpertsA
Carbonyl group is free in all the monosaccharides. Hence, they are all reducing sugars.
The disaccharides in which carbonyl group is involved in bonding cannot react with Tollens' reagent or fehling's solution. Hence, they are nonreducing.
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