Which of the following disaccharides will not reduce Tollens reagent? (IIT-JEE, 2005)
A
Only P
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B
Only Q
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C
Both P and Q
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D
None of these
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Solution
The correct option is B Only Q
(P) will reduce Tollens reagent since it has free hemiacetal linkage.
(Q) will not reduce Tollens reagents since it does not have free hemiacetal linkage; both are involved in glycosidic linkage.