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Q.

A disaccharide does NOT give a positive test for Tollens reagent. Upon acidic hydrolysis, it gives an equimolar mixture of two different monosaccharides, both of which can be oxidized by bromine water. This disaccharide is

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a

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b

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c

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d

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answer is D.

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Detailed Solution

Bromine water oxidizes aldose sugars only not ketose sugar. “A” gives one aldose & one Ketose sugar. B & C produces two moles of same monosaccharides. Only “D” gives two different aldose sugars on hydrolysis.

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A disaccharide does NOT give a positive test for Tollens reagent. Upon acidic hydrolysis, it gives an equimolar mixture of two different monosaccharides, both of which can be oxidized by bromine water. This disaccharide is