How many products are produced respectively when optically pure glucose and fructose are reduced one by one by $NaBH_4$?

What is the quantity of water required to obtain one mole of glucose from one mole of sucrose by acid hydrolysis (in $g$)?

Identify the pair of carbohydrates containing galactose as one of the constituents in both of them.

Given below are two statements.
Statement $I$: Maltose has two $\alpha$-$D$-glucose units linked at $C_1$ and $C_4$ and is a reducing sugar.
Statement $II$: Maltose has two monosaccharides: $\alpha$-$D$-glucose and $\beta$-$D$-glucose linked at $C_1$ and $C_6$ and it is a non-reducing sugar.
In the light of the above statements,choose the correct answer from the options given below.

The letter '$D$' in $D$-glucose signifies

Which of the following does not undergo hydrolysis to yield aldoses and ketoses?