Question

How are pure substances different from impure substances?

Answer 1

Answer:

Pure substances —

1. Pure substances have definite composition and definite physical and chemical properties.
2. They are all homogeneous i.e. their composition is uniform throughout the bulk.
3. Examples: Elements and compounds.

Impure substances —

1. Impure substances are made up of two or more pure substances mixed together in any proportion.
2. They may be homogeneous or hetergeneous i.e. their composition is not uniform throughout the bulk.
3. They are all mixtures
4. Examples: air, sea water, petroleum, a solution of sugar in water are all impure substances.

Explanation:

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