On hydrolysis,sucrose gives:

Select the evidence for the open chain structure of glucose.

The reaction of glucose with acetic anhydride confirms the:

The optical rotation of the $\alpha$-form of a pyranose is $+150.7^{\circ}$,that of the $\beta$-form is $+52.8^{\circ}$. In solution,an equilibrium mixture of these anomers has an optical rotation of $+80.2^{\circ}$. The percentage of the $\alpha$-form in the equilibrium mixture is $....... \%$.

Which of the following is a disaccharide?

The general formula for a disaccharide is ...... .