Statement I ; Fructose gives positive Tollen's test
Statement II ; Fructose is a reducing sugar
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;