Which of the following disaccharides yields two molecules of glucose upon hydrolysis?

What is gained due to hydrolysis of maltose?

The chemical bond represented by $-C-O-C-$ is known as:

Aqueous solution of carbohydrate with $2$ drops of alcoholic solution of $\alpha$-naphthol and $H_{2}SO_{4}$ gives a ring at the junction. The colour of the ring is:

Glycogen is a .........

Which one of the following cannot be hydrolysed further into smaller molecules?