Which of the following is a disaccharide?

The main product obtained by the hydrolysis of starch in the presence of the enzyme amylase is........

Which reagent/s can be used to distinguish glucose and fructose?
$I$. Bromine water
$II$. Tollen's reagent
$III$. Schiff's reagent

In which of the following compounds are all the monosaccharide units $NOT$ joined by a $C_1-O-C_4$ glycosidic linkage?

$D$-Glucose $\overset{OH^{-}}{\longleftrightarrow} A + B$; $A$ and $B$ are

How will you distinguish $1^o$ and $2^o$ hydroxyl groups present in glucose? Explain with reactions.