Which of the following carbohydrates is a disaccharide?

Which is the chemical test for polysaccharide?

The specific rotations of $\alpha-$ and $\beta-$ glucose are different. When either is dissolved in water,their rotation changes until a constant value is reached. This phenomenon is called ......

Which among the following reagents is used to obtain gluconic acid from glucose?

The following carbohydrate is

Which reagent oxidizes glucose to saccharic acid?