Answer to Question #140970 in General Chemistry for Kim

Question

Reaction of different sugars with Molisch and Bials reageant.
Observations

Sugar solution. Molisch Test Bial's Test
5% starch
5% galactose
5% fructose
5% starch
5% arabinose
5% glucose
5% maltose
5% sucrose
water

Answer 1

The Molisch reaction is a classic example of a qualitative reaction to carbohydrates. So, all carbohydrates from the list will give a positive reaction: a characteristic "brown ring" located between the two layers.

TheBial's test will give a positive result with solutions containing pentose (in this case, arabinose).