Assertion(A): Sucrose is a reducing sugar.
Reason(R): On hydrolysis sucrose bring the change in sign of rotation from dextro(+) to laevo(-)
In the light of the above statements, choose the most appropriate answer from the options given below.

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A is correct but R is not correct

Both A and R are correct R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

A is not correct but R is correct

answer is C.

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Detailed Solution

Sucrose is a non-reducing sugar because the two monosaccharide units are held together by a glycosidic linkage between C₁ of α-glucose and C₂ of β-fructose. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non-reducing sugar.

The hydrolysis of sucrose brings about a change in the sign of rotation from dextro(+) to laevo(-) and the product is named as invert sugar.

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