Interpretation:
The terms mixture and substances needs to be compared.
Concept introduction:
The

Explanation of Solution
Substances which cannot be separated into other constituents and have a particular composition is known as pure substances.
Pure substances are further classified into two types:
Mixture
Compounds
Pure substances are pure in nature. They cannot be separated by physical process.
Examples of pure substances are gold and pure water.
Mixtures are the combination of two or more pure substances.
They are of two types:
Homogeneous mixture
Heterogeneous mixture.
Mixtures are impure in nature. They can be separated by magnetic separation and evaporation etc.
Examples of mixtures are oil and water, sand and sugar
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