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Why is D-fructose used for sweetening co...

Why is `D`-fructose used for sweetening cold drinks but not hot ones?

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The correct Answer is:
Fructose `overset("tautomerises")(rarr)D-Glucose +D-"mannose"`
Which are oxidised to corresponding acids which are not sweet more ever hemiacetal structures under goes fission on heating to less carbon structures which are not sweet.
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