The aldehydes in reducing sugars will reduce silver ion from Tollen's reagent to metallic silver, leaving a reflective mirror on the inside of a flask.

Last year, chemists at the Howard Hughes Medical Institute’s Janelia Research Campus decided to bring some holiday cheer to their colleagues and let them make their own silver ornaments. Janelia’s ...

Answer: (i) The carbonyl group of aldehydes and ketones is reduced to the CH 2 group on treatment with zinc amalgam and concentrated hydrochloric acid. (ii) Aldehydes which do not have an α-hydrogen ...