The change in specific rotation of glucose is due to which phenomenon?

How do you explain the absence of aldehyde group in the pentaacetate of $D$-glucose?

Which of the following carbohydrates does not show mutarotation?

Which of the following structures represents $\alpha-D$-glucose?

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

Cellulose upon acetylation with excess acetic anhydride $/$ $H_2SO_4$ (catalytic) gives cellulose triacetate whose structure is