A non-reducing sugar ”A” hydrolysis to give two reducing monosaccharides. Sugar A is:

Glucose

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Fructose

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Sucrose

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Galactose

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Solution

The correct option is C Sucrose
Answer: (c)
Glucose, Fructose and Galactose are monosaccharides, they cannot undergo further hydrolysis.

Sucrose has neither aldehyde of glucose nor ketone of fructose because of $C_{1} - C_{2}$ glycosidic linkage. So, it is non-reducing in nature.

$C_{12} H_{22} O_{11} + H_{2} O \to C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6}$

On hydrolysis of sucrose, it gives D-glucose and D-fructose which have acetal group so they are reducing monosaccharides.

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