Glucose molecule reacts with $X$ number of molecules of phenylhydrazine to yield osazone. The value of $X$ is

Treatment of $D$-glucose with aqueous $NaOH$ results in a mixture of monosaccharides,which are

Four carbohydrates: glucose,lactose,sucrose,and starch are present. Different tests are carried out with these $4$ carbohydrates separately. The following observations are made:
$(a)$ Heated: It is charred.
$(b)$ $I_2$ solution: No violet colour.
$(c)$ Fehling solution: Reddish brown precipitate is observed.
$(d)$ It does not reduce copper$(II)$ acetate to $Cu_2O$. No red precipitate is observed in $5 \ min$.
Which carbohydrate satisfies all the above observations?

Which of the following represents the anomer of the compound shown?

It is best to carry out reactions with sugars in neutral or acid medium and not in alkaline medium. This is because in alkaline medium,sugars undergo one of the following changes:

Hydrolysis of sucrose by acid or enzymes yields an equimolar mixture of glucose and fructose,which is known as .....