MHT CET 2023 Chemistry question

Identify the carbon atoms of -glucose and -fructose forming glycosidic linkage in sucrose.

(A)C-1 of -fructose and C-2 of -glucose
(B)C-1 of -glucose and C-2 of -fructoseCorrect
(C)C-1 of -glucose and C-1 of -fructose
(D)C-2 of -glucose and C-2 of -fructose

Answer: (B)

Solution

Sucrose is a non-reducing disaccharide made of -D-glucopyranose and -D-fructofuranose joined by an -1,2-glycosidic linkage. Glucose is an aldose, so its anomeric (hemiacetal) carbon is C-1; fructose is a ketose, so its anomeric carbon is C-2. The

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Question ID VK-094598