Which must be a mixture of substances?
a- Solid
b- Liquid
c- Gas
d- Solution
question not complete
Solution
The answer is d- Solution.
To understand why a solution must be a mixture of substances, let's define what a solution is. A solution is a homogeneous mixture that is composed of two or more substances. In a solution, the components are evenly distributed, meaning that the particles of one substance are dispersed uniformly throughout the other substance.
Now, let's discuss why a solution must involve a mixture of substances:
1. A Solid Solution: A solid solution can be formed when one or more substances are dissolved into a solid solvent. For example, when salt (solute) is dissolved in water (solvent), it forms a solid solution called a "saltwater solution". Here, the salt particles are uniformly distributed within the water.
2. A Liquid Solution: A liquid solution is formed when a substance dissolves in a liquid solvent. Some examples include sugar dissolved in water, alcohol mixed with water, or carbon dioxide dissolved in soda. In all of these cases, the substances mix to form a liquid solution.
3. A Gas Solution: A gas solution is formed when one or more gases dissolve in another gas. For example, the air we breathe is a mixture of gases, including oxygen, nitrogen, carbon dioxide, and others. Each gas component in the air forms a gas solution with the other gases present.
4. A Solution in General: In general, a solution can consist of any combination of substances, as long as they form a homogeneous mixture. This means that the substances can be solid, liquid, or gas, or any combination thereof. Therefore, a solution can be a mixture of solid, liquid, or gas, making option d- Solution the correct answer.
In summary, a solution must be a mixture of substances, and it can involve solids, liquids, or gases, or any combination of these states of matter.