Properties of gas are as follows:

1. Occupies more space than solids or liquids:
- Gases have the ability to expand and fill the entire space available to them. Unlike solids and liquids, which have fixed volumes, gases do not have a definite shape or volume. They will spread out to occupy any container they are placed in, taking up all available space.

2. Particles are far apart:
- In a gas, the particles are spread out and have large distances between them. These particles, known as molecules or atoms, are not tightly packed like in solids or liquids. The large gaps between gas particles allow for easy movement and flow.

3. Freely moving:
- Gas particles are in constant motion and move freely in all directions. They are not held together by any strong forces like in solids or liquids. This random motion of gas particles allows them to fill the entire space available to them.

4. Compressible:
- Gases are highly compressible compared to solids and liquids. The large spaces between gas particles allow for compression, which means that the volume of a gas can be reduced by applying pressure. When pressure is applied, the gas particles are forced closer together, decreasing the volume they occupy.

5. Low density:
- Gases have a low density compared to solids and liquids. This is because the particles in a gas are spread out and have large spaces between them. The low density contributes to the ability of gases to expand and fill a container.

6. Diffusion and mixing:
- Gases have the property of diffusion, which is the spontaneous mixing of gas particles. Due to their random motion, gas particles move from an area of high concentration to an area of low concentration, resulting in a uniform distribution of the gas throughout a container.

In conclusion, the properties of gases include occupying more space than solids or liquids, having particles that are far apart, and being freely moving. Gases are also compressible, have low density, and exhibit diffusion and mixing.