First slide

Fructose

Question

Statement I ; Fructose does not give positive Tollen's test
Statement II ; Fructose is a reducing sugar

Easy

A

Statements I and II are correct
B

Statement I is correct and statement II is incorrect
C

Statement I is incorrect and statement II is correct
D

Statements I and II are incorrect

Solution

Though fructose is a ketose it is a reducing sugar;
It gives positive Tollen's,Fehling's and Benedict's test;
All the above reagents oxidize the aldehyde group to carboxylic acid group in alkaline medium;
Fructose in alkaline medium undergoes reversible isomerisation(Lobry-debruyn-van ekenstein rearrangement) to give a mixture of glucose,fructose and mannose.
$∴$ fructose gives postive Tollen's,Fehling's and Benedict's test;

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