Cellulose upon acetylation with excess acetic anhydride $/ \mathrm{H}_2 \mathrm{SO}_4$ (catalytic) gives…
Cellulose upon acetylation with excess acetic anhydride $/ \mathrm{H}_2 \mathrm{SO}_4$ (catalytic) gives cellulose triacetate whose structures is
Solution
Cellulose is a straight chain polysaccharide composed of D-glucose units, which are joined by $\beta$-glycosidic linkages between $\mathrm{C}-1$ of one glucose and C-4 of the next glucose. In one, unit only three hydroxy groups are free to form acetate, that's why called cellulose triacetate
