Which monosaccharide forms a pentaacetate when reacted with acetic anhydride?
Glucose, with five -OH groups in its open chain form, reacts with acetic anhydride to form a pentaacetate, confirming its structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Carbohydrates - Monosaccharides - Structure and Properties