( 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 .