The physical properties of gases on the basis of kinetic theory can be explained as :
1. According to the kinetic theory of gases, the gas molecules have free space between them as they are far away from each other. So, gases can be easily compressed, and if two gas containers are joined, then the density in both the gas containers will become equal.
2. As there is no force of attraction between the gas molecules and there is more kinetic energy due to which gas molecules move to the free space available. That is why, gases have no fixed shape and no fixed volume. Thus, gases get completely filled in the container in which they are kept.
Example: When the lid of a perfume bottle is open, the aroma gets filled in the room.
