Question
Differentiate between pure and impure substances.
| Pure Substances | Impure Substances |
| Pure substances have a definite chemical composition and definite physical and chemical properties. | Impure substances are made up of two or more pure substances mixed in any proportion. They do not have a definite set of properties. |
| Pure substances are all uniform, i.e., their composition is uniform throughout the bulk | Impure substances may be non-uniform or uniform i.e., their composition is not uniform throughout the bulk. |
| Examples are gold, silver, water, sodium chloride, etc. | Examples are air, seawater, a solution of sugar in water, etc. |
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