JEE Main Chemistry question

Sugars are characterized by the preparation of osazone derivatives. Which sugars have identical osazones?

(A)Glucose and lactose
(B)Glucose and fructoseCorrect
(C)Glucose and arabinose
(D)Glucose and maltose

Answer: (B)

Solution

Osazone formation involves only C1 and C2 of a sugar, so two sugars give identical osazones if they share the same configuration from C3 onward; glucose and fructose differ only at C1/C2 (aldehyde vs ketone with adjacent CHOH)

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Question ID VK-150920