( iii) Glucose reduces ammoniacal silver nitrate solution( Tollen ‟ s reagent) to metallic silver and also Fehling ‟ S solution or Benedict solution to reddish brown cuprous oxide( Cu2O) and itself gets oxidised to gluconic acid. This confirms the presence of an aldehydic group in glucose.
( iv) With mild oxidising agent like bromine water, glucose is oxidised to gluconic acid. Glucose on oxidation with nitric acid gives saccharic acid.
( vii) Glucose on reaction with methyl alcohol in the presence of dry HCl( g) forms α and β-methyl glycosides. The reaction occurs only at the OH of hemiacetylic carbon.