Correct option is (C) . since molecules are closely packed in solid ,they have the least intermolecular space and strong intermolecular force of attraction .They can not move from there place giving solids a definite shapes and volume.

Introducing the Concept of Intermolecular Space

Matter is composed of tiny particles called molecules. These molecules are made up of even smaller particles called atoms, which are held together by chemical bonds. In any substance, there is space between these molecules, known as the intermolecular space.

Understanding the Significance of Intermolecular Space

The intermolecular space plays a crucial role in determining the physical properties of a substance. It affects characteristics such as density, compressibility, and thermal expansion. The amount of intermolecular space can vary depending on the state of matter, with different substances having different intermolecular spaces.

Exploring the Options

Now, let's analyze the given options to determine which one has the least intermolecular space:

a) Water: Water is a liquid at room temperature. In the liquid state, the molecules are in constant motion but still close enough to interact with each other. This suggests that water molecules have a moderate intermolecular space.

b) Steam: Steam is the gaseous form of water. In the gaseous state, the molecules are further apart and have more freedom of movement. As a result, steam molecules have a larger intermolecular space compared to liquid water.

c) Ice: Ice is the solid form of water. In the solid state, the molecules are tightly packed and arranged in a regular pattern. This leads to ice having the least intermolecular space among the three options.

Understanding the Correct Answer

The correct answer is option 'c' - ice. Ice has the least intermolecular space because the molecules are held together in a rigid structure, forming a crystalline lattice. This arrangement allows for minimal movement and closely packed molecules.

In summary, the intermolecular space is the least in ice when compared to water and steam. Ice, being a solid, has a tightly packed molecular structure, resulting in the least amount of space between molecules.