What are the water-soluble carbohydrates? What features of the structure of their molecules provide the property of solubility?

Many carbohydrates are water soluble. For example – glucose and fructose. These substances dissolve very quickly in water. This can be seen with sugar, since sugar is half glucose and half fructose. But starch is practically insoluble in water. It is broken down only by the action of digestive enzymes. You can verify this yourself. If you put a small amount of starch in the oral cavity, then it is broken down by the action of amylase in saliva to glucose. We will taste a sweet taste.