**Explanation:**

When sugar is dissolved in water, the level of water does not change. This can be explained by examining the properties of both sugar and water and the process of dissolving.

**The Process of Dissolving:**
When a solid substance, such as sugar, is dissolved in a liquid, such as water, it undergoes a physical process called dissolving. Dissolving occurs due to the interaction between the solute particles (sugar) and the solvent particles (water). The solvent particles surround the solute particles and separate them, resulting in a homogeneous mixture.

**Properties of Sugar and Water:**
To understand why the level of water does not change when sugar is dissolved, we need to consider the properties of both sugar and water.

1. **Sugar (Solute):** Sugar is a solid substance composed of individual sugar molecules. These molecules are relatively large and have a significant molecular weight. Sugar particles are capable of interacting with water molecules due to their polarity.

2. **Water (Solvent):** Water is a polar molecule with a bent shape. It consists of two hydrogen atoms bonded to an oxygen atom. The oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges. This polarity allows water molecules to form hydrogen bonds with other water molecules and interact with other polar substances.

**Why the Level of Water Does Not Change:**
When sugar is added to water, the following steps occur:

1. **Separation of Sugar Molecules:** As sugar is added to water, the solvent particles (water molecules) surround the solute particles (sugar molecules). The water molecules interact with the sugar molecules, causing them to separate from each other.

2. **Interactions between Sugar and Water:** The polar water molecules interact with the polar sugar molecules. The partial positive charges on the hydrogen atoms of water molecules are attracted to the partial negative charges on the sugar molecules, forming hydrogen bonds.

3. **Dispersion of Sugar Molecules:** The interactions between water and sugar molecules cause the sugar molecules to disperse evenly throughout the water. This creates a homogeneous mixture where the sugar is dissolved in the water.

**No Change in Volume:**
The dissolution of sugar in water does not result in a change in the volume or the level of water for several reasons:

- The sugar molecules are relatively large compared to individual water molecules. Therefore, the addition of sugar does not significantly increase the total number of particles in the solution, resulting in minimal changes in volume.
- The intermolecular forces between the water molecules and the sugar molecules do not cause a significant change in the density of the solution. Therefore, the level of water remains relatively unchanged.

In conclusion, the level of water does not change when sugar is dissolved in it because the sugar molecules disperse throughout the water without significantly increasing the total number of particles or changing the density of the solution.

Water molecules have atoms arranged far away from each other. So there are much intermolecular spaces between them. When salt/sugar is dissolved in water, the molecules of salt/sugar goes into the these spaces. Thus no water level rise takes place. but as we go on adding salt/sugar, a time comes when no intermolecular spaces are left. This point is called saturation point and the solution is referred to as the saturated solution. Adding extra amount of sugar/salt in after it is saturated, the level will rise. but not before saturation.