Adding sugar to the water increases its boiling point. This is because the sugar molecules compete with the water molecules for space at the surface of the liquid. As a result, fewer water molecules can escape from the liquid, which means that the water must reach a higher temperature in order to boil.

Density

Adding sugar to water increases its density. This is because sugar is denser than water. As a result, the same volume of water with added sugar will weigh more than the same volume of pure water.

Viscosity

Adding sugar to water increases its viscosity. This is because the sugar molecules slow down the movement of the water molecules. As a result, the water becomes thicker and more difficult to pour.

Refractive index

Adding sugar to water increases its refractive index. This is because the sugar molecules bend light more than water molecules. As a result, a beam of light will bend more when it passes through water with added sugar than it will when it passes through pure water.

Color

Adding sugar to water can change its color. This is because the sugar molecules can absorb light. The amount and type of light absorbed depends on the type of sugar and the concentration of the solution.