Solid, liquid and gas are the three states of matter. However, matter can also be classified into pure substances and mixtures. Substances which have a specific composition and cannot be separated into any constituents are called pure substances. Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz. heterogeneous and homogeneous mixtures. A few differences between pure substances and mixtures have been tabulated below.
Difference Between Pure Substance And Mixture
| Properties | Pure Substance | Mixture |
| Define | The substances that are made of a single element or compound are called pure substances | Several elements & compounds together form a mixture |
| Categorization | Solid, liquid, gas | Heterogeneous, homogeneous |
| Physical properties | Constant | Vary |
| Purity | Pure | Impure |
| Separation by a physical process | Not possible | Possible to separate by evaporation, magnetic separation, etc. |
| Chemical properties | Constant | Vary |
| Example | Gold, pure water, hydrogen gas | Oil & water, sand & sugar |
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Some important links:
| Homogeneous and Heterogeneous Mixture | Homogeneous Mixture |
give short answer of what is difference between a substance and a pure substance
Substance is a particular type of matter, which you can put a name to. Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. A pure substance is a single substance on its own.