how can I identified following unlabeled solutions

Question

Prepare a report explaining, how would you use distinguish the following five unlabelled solutions containing. Aqueous fructose solution

Aqueous ribose solution

Aqueous maltose solution

Soluble starch solution

A protein solution

Answer 1

Unlabeled solutions isn't a good practice in the lab: ALWAYS label your flasks to identify risk and safety.

1. From all solutions, an absorbance read at 280 nm (nanodrop, or quartz cuvette), will allow you to monitor UV absorbing groups... and these groups will only be present on the protein backbone (tryptophane, tyrosine, phenylalanine, or histidine); all other solution will be "silent" on UV mode.
2. The starch solution will have a specific reactivity with iodine solution, and will be turning deep blue.
3. While ribose and maltose are both carbohydrates, ribose is a monosaccharide, and maltose is a disaccharide (a dimer of glucose). Ribose, but not maltose, will give a positive result to the Barfoed’s test (RedOx reaction in presence of Cu2+ acetate in an acidic medium). The result is the formation of brick red precipitate.