Chemistry - Biomolecules Question with Solution | TestHub

Glucose reacts with hydroxylamine ($N{H}_{2}OH$) to form an oxime.

This reaction is a characteristic property of aldehydes and ketones, which confirms the presence of a carbonyl group ($>C=O$) in the glucose molecule.

The reaction with hydrogen iodide ($HI$) confirms the straight chain of six carbon atoms, while oxidation with nitric acid confirms the primary alcoholic group.

Answer: Carbonyl group