Form 1:
Classification of substances

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Introduction to Classification of substances

Substances are either pure or impure. A pure substance is one which contains only one substance.

An impure substance is one which contains two or more substances. A pure substance is made up of a pure solid, pure liquid or pure gas.

A mixture is a combination of two or more pure substances which can be separated by physical means.

The three states of matter in nature appear mainly as mixtures of one with the other.

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