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JEE Main levelSingle correct optionDifficulty 2 of 3bm024

Sucrose does not reduce Fehling solution because

Athe anomeric carbons of both units are used in the glycosidic bond, leaving no free hemiacetal or hemiketal group
Bit has a ketone group
Cit is insoluble in water
Dit has no hydroxyl groups

Answer: A

The C-1 of glucose and C-2 of fructose are both part of the glycosidic linkage, so neither ring can open to give a free carbonyl group.

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