Chemistry - Biomolecules Question with Solution | TestHub

A polysaccharide '$\mathrm{X}$' on boiling with dil${\mathrm{H}}_2{\mathrm{SO}}_4$at$393 \mathrm{K}$under$2-3 \mathrm{atm}$pressure yields '$\mathrm{Y}$' '$\mathrm{Y}$' on treatment with bromine water gives gluconic acid. '$\mathrm{X}$' contains$\mathrm{\beta }$-glycosidic linkages only. Compound '$\mathrm{X}$' is :