Compounds
1. Compounds are pure substances.
2. They are made up of two or more elements combined chemically.
3. The constituents of a compound are present in a fixed ratio.
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4. Compounds have fixed properties. For example, a particular compound will have fixed temperatures at which it melts and boils.
5. A compound can have properties different from its constituents, as a new substance is formed when the constituents are chemically combined.
6. The constituents of a compound can be separated only by chemical methods.
Mixtures
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1. Mixtures are impure substances.
2. They are made up of two or more substances mixed physically.
3. The constituents of a mixture are present in varying ratios.
4. Mixtures do not have fixed properties. Their properties depend on the nature of their components and the ratios in which they are combined.
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5. In mixtures, no new substance is formed. The properties of a mixture are the same as the properties of its constituents.
6. The constituents of a mixture can be separated easily by physical methods.