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  4. The correct statement(s) about the following sugars X and Y is/are

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Q. The correct statement(s) about the following sugars $X$ and $Y$ is/areChemistry Question ImageChemistry Question Image

IIT JEEIIT JEE 2009Biomolecules

Solution:

$X$ is acetal, has no free hemiacetal, hence a non-reducing sugar while $Y$ has a free hemiacetal group, it is reducing sugar. Also, glucosidic linkage of $X$ is -$\beta$ - while that of $Y$ is $\beta$-linkage.