Assertion (A): Sucrose is a non-reducing sugar
Reason (R): Sucrose has glycosidic linkage.

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

Both A and R a true but R is not the correct explanation of A

A is true but R is false

A is a false but R is true

answer is B.

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Detailed Solution

The reason that sucrose is a non-reducing sugar is that it has no free aldehyde or keto group. Sucrose is a disaccharide, which is composed of glucose and fructose. In sucrose, the components glucose and fructose are linked via an ether bond between C₁
on the glucosyl subunit and C₂on the fructosyl unit. The bond is called a glycosidic linkage. Hence, sucrose has 1 - 2 glycosidic linkage. So, Both A and R a true but R is not the correct explanation of A.

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