JEE Main Chemistry question

[K CET 2011] α-maltose consists of

(A)One α-D-glucopyranose unit and one β-D-glucopyranose unit with 1-2 glycosidic linkage
(B)Two α-D-glucopyranose units with 1-2 glycosidic linkage
(C)Two β-D-glucopyranose units with 1-4 glycosidic linkage
(D)Two α-D-glucopyranose units with 1-4 glycosidic linkageCorrect

Answer: (D)

Solution

Maltose is formed from two D-glucopyranose units joined by a C1–C4 glycosidic bond. In α-maltose, the glycosidic (anomeric) carbon C1 of the first glucose unit has the α-configuration, while the second unit retains a free

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Question ID VK-150573