JEE Main Chemistry question

Which is not a reducing sugar?

(A)Glucose
(B)Fructose
(C)Mannose
(D)SucroseCorrect

Answer: (D)

Solution

A reducing sugar has a free anomeric (hemiacetal) centre that can open to expose a reactive carbonyl group able to reduce Tollens' or Fehling's reagent. Glucose, fructose and mannose each retain a free anomeric carbon

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Question ID VK-150578