Glucose reacts with phenylhydrazine to form osazone. How many moles of phenylhydrazine are consumed in this reaction?

Which of the following is a reducing sugar?

The carbohydrate which does not react with ammoniacal $AgNO_3$ solution is

What is the molecular formula of glyceraldehyde?

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.

Which of the following is a disaccharide?