The intermolecular space refers to the space between molecules in a substance. It is the distance between the particles that make up the substance. The amount of intermolecular space can vary depending on the state of matter - solid, liquid, or gas.

In a solid, the molecules are tightly packed together in a regular arrangement. The intermolecular space between molecules is very small, and the particles are held in fixed positions by strong forces of attraction. This is why solids have a definite shape and volume.

In a liquid, the molecules have more freedom to move around compared to a solid. The intermolecular space between molecules is larger than in a solid, but still relatively close together. The particles are not held in fixed positions, but they are still attracted to each other. This is why liquids have a definite volume but take the shape of their container.

In a gas, the molecules are spread out and have a lot of freedom to move. The intermolecular space between molecules is the largest in a gas. The particles are not held together by strong forces of attraction and move freely. This is why gases do not have a definite shape or volume and can expand to fill their container.

So, the correct answer is option 'C' - gas. In a gas, the intermolecular space between molecules is maximum compared to a solid or a liquid. The particles in a gas are far apart from each other, allowing them to move freely and independently.

To summarize:
- In a solid, the intermolecular space between molecules is very small.
- In a liquid, the intermolecular space between molecules is larger than in a solid, but still relatively close together.
- In a gas, the intermolecular space between molecules is maximum, with the particles being far apart from each other.

The intermolecular space refers to the space between molecules in a substance. The maximum intermolecular space indicates that the molecules are far apart from each other.
The intermolecular space between molecules is maximum in a gas. Here's why:
Explanation:
1. Gas: In a gas state, the molecules are loosely packed and have high kinetic energy. They move freely and randomly in all directions, and the attractive forces between molecules are very weak. As a result, the intermolecular space between gas molecules is maximum.
2. Liquid: In a liquid state, the molecules are closer together compared to a gas. The attractive forces between liquid molecules are stronger than in a gas, but not as strong as in a solid. Therefore, the intermolecular space in a liquid is less than in a gas.
3. Solid: In a solid state, the molecules are tightly packed and have strong attractive forces between them. The intermolecular space in a solid is minimal as the molecules are closely arranged in a rigid structure.
4. All of these: The answer option "All of these" is incorrect because the intermolecular space is not maximum in all three states of matter. It is only maximum in a gas.
In conclusion, the intermolecular space between molecules is maximum in a gas because the molecules are far apart and move freely.