Which pair of compound will show mutarotation?

Glucose, Fructose

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Glucose, Sucrose

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Maltose, Sucrose

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Starch, Fructose

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Solution

The correct option is A Glucose, Fructose
Glucose and Fructose are monosaccharides that show mutarotation.
Mutarotation is the change in the optical rotation because of the change in the equilibrium between two anomers, when the corresponding stereocentres inter-convert. Cyclic sugars show mutarotation when the anomeric forms interconvert. Glucose, maltose, fructose and galactose show mutarotation while sucrose and starch does not.

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