Which one of the following does not exhibit the phenomenon of mutarota – InterviewSolution

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1.	Which one of the following does not exhibit the phenomenon of mutarotation ?A. `(-) - ` FructoseB. `(+) -` SucroseC. `(+) -` LactoseD. `(+) -` Maltose
Answer» Correct Answer - B `(+)-` Sucrose does not undergo mutarotation in solution because it does not contain a "free" aldehyde or ketone group. Only reducing sugars (remember, sucrose is a non-reducing sugar) that exist in hemiacetal and hemiketal forms, undergo mutarotation in aqueous solution. In sucrose, the hemiacetal and hemiketal groups of glucose and furctose are linked together through `O-`atom and thus, not free. Due to the absence of free hemiacetal or hemiketal group, sources does not exhibit mutarotation.

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