Chemistry - Biomolecules Question with Solution | TestHub

During osazone formation (when sugars are reacted with phenylhydrazine) the reaction occurs at ${\mathrm{C}}_1$ and ${\mathrm{C}}_2$ while rest of the position remains intact. Since glucose and fructose differ from each other only in the arrangement of atom at $C_1$ and $C_2$, therefore they give the same osazone.