👉 Interchased, also known as interchanged or interchangeable, is a concept in chemistry and physics that refers to two or more substances that are in a chemical or physical state such as solid, liquid, gas, or vapor. These substances can be mixed together to form an unchanging mixture, but the properties of one substance do not change when it is mixed with another. For example, in a mixture of water and air, the water molecules will remain bound to each other while the air