JEE Main Chemistry question

[J & K CET 2004] Mutarotation doesn't occur in

(A)SucroseCorrect
(B)D-glucose
(C)L-glucose
(D)None of these

Answer: (A)

Solution

Mutarotation requires a free anomeric (hemiacetal) centre that can open to the aldehyde/ketone form and re-close with either configuration; D-glucose and L-glucose both possess such a free anomeric carbon and show mutarotation. Sucrose has both

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Question ID VK-150610