What happens when you add sugar to water?

Hint: We need to know that the basic functional unit of carbohydrates is \[{\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\]. It is a combination of carbon and water. The monomer unit of carbohydrate is \[{\text{C}}{{\text{H}}_{\text{2}}}{\text{O}}\]. Glucose is a well known and simplest example for carbohydrates. The chemical formula of glucose is \[{{\text{C}}_{\text{6}}}{{\text{H}}_{{\text{12}}}}{{\text{O}}_{\text{6}}}\]. The simplest representation of glucose molecule is \[{{\text{(C}}{{\text{H}}_{\text{2}}}{\text{O)}}_6}\].

Complete answer:
We need to remember that the sugar added to water means sucrose converts into glucose and fructose due to hydrolysis. The initial sugar is in crystal form. When adding sugar to water it became a syrupy solution. Here sugar acts as solute, the water acts as solvent and syrupy acts as solution.
When adding sugar to water, the disaccharide of sucrose is converted into monosaccharides of glucose and fructose.

Additional information:
We have to know that carbohydrates are classified as two types. This classification is based on the functional monomer in the carbohydrates. In carbohydrates aldehyde and ketone act as monomers. According to that, carbohydrates are separated as aldose and ketose.
carbohydrates are also classified as many types depending on the number of the carbon atom. Depending on the value of n \[(3,4,5,6,...)\] are classified as (trioses, tetroses, pentoses, hexoses etc…).
Carbohydrates are classified as three major groups. This classification is based on the hydrolysis of carbohydrates. There are monosaccharides, oligosaccharides and polysaccharides. Monosaccharides here means only one carboxylic group in the molecule. Respect that carboxylic group hydrolysis will happen. Glucose, fructose are examples of monosaccharides. Lactose and maltose are examples of oligosaccharides, because they contain more than one functional monomer in the structure. Starch, glycogen and cellulose are the examples of polysaccharides because they have more than three monomers in the structure.

Note:
We need to know that carbon and water are the basic unit of carbohydrates. The word meaning of carbohydrate is \[{\text{carbon + hydrate}}\]. Hydrate means nothing but water. Carbohydrates are also known as saccharides. The word meaning of saccharides is sugar. In the human body carbohydrates are stored as glycogen. In plants carbohydrates store as starch. It is the main source of energy for human beings.