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weqwewe [10]
3 years ago
6

Why do some disaccharides give positive Benedict’s tests while other disaccharides give negative tests?

Advanced Placement (AP)
1 answer:
vodka [1.7K]3 years ago
8 0

Basically, Benedict's test identifies the existence of aldehydes and alpha-hydroxy-ketones, also by hemiacetal, as well as those that take place in specific ketoses. Therefore, it is an alpha-hydroxy-ketone even if the ketose fructose is not strictly a reducing sugar, and provides a positive test since it is transformed into the mannose and aldoses glucose by the base inside the reagent.

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