A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a disaccharide.

Here's why:

* Hydrolysis is the process of breaking down a molecule by adding water.

* Disaccharides are made up of two monosaccharide (simple sugar) units linked together.

* When a disaccharide is hydrolyzed, the bond between the two monosaccharides is broken, and you are left with two individual monosaccharide molecules.

Examples of disaccharides include:

* Sucrose (table sugar): Glucose + Fructose

* Lactose (milk sugar): Glucose + Galactose

* Maltose (malt sugar): Glucose + Glucose