A gas is a substance with no definite volume and no definite shape. Solids and liquids have volumes that do not change easily. A gas, on the other hand, has a vol- ume that changes to match the volume of its container. The molecules in a gas are very far apart compared with the molecules in a solid or a liquid.

Explanation:


Gases do not have a definite volume as the particles in gases move freely and do not have a fixed position. Therefore, the volume of gases can be different depending on the container they are in. Hence, the correct answer is option 'D' which states that the volume of gases takes the volume of the container they are in.

Factors affecting the volume of gases:


The volume of gases can be affected by several factors such as pressure, temperature, and the number of gas particles present.

Boyle's law:


Boyle's law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure. This means that if the pressure of a gas is increased, its volume will decrease and vice versa.

Charles' law:


Charles' law states that at a constant pressure, the volume of a gas is directly proportional to its temperature. This means that if the temperature of a gas is increased, its volume will also increase and vice versa.

Avogadro's law:


Avogadro's law states that at a constant temperature and pressure, the volume of a gas is directly proportional to the number of gas particles present. This means that if the number of gas particles is increased, the volume of the gas will also increase and vice versa.

Conclusion:


In conclusion, the volume of gases is not definite and depends on the container they are in. The volume of gases can also be affected by factors such as pressure, temperature, and the number of gas particles present.

A gas is a substance with no definite volume and no definite shape. When we take container then we can take volume of gas by measuring the volume of container...so the correct answer is D