Class 9 Chemistry Is Matter Around Us Pure Mixtures


  • A mixture is a substance which consists of two or more elements or compounds not chemically combined together.
  • For Example: - Air is a mixture of gases like oxygen, nitrogen, argon, CO2 and water vapour.
  • All solutions are mixtures.
    • For-Example: - salt-solution (also known as brine) is a mixture of sodium chloride in water.
  • Types of Mixtures
  1. Homogeneous Mixture
    1. Those mixtures, in which the substances are completely mixed together and are indistinguishable from one another, are called homogeneous mixtures.
    2. For example: - All homogeneous mixtures are solutions. Example: - Soda water, Soft drinks, lemonade etc.
    3. A Mixture of sugar in water (called sugar solution).



  1. Heterogeneous Mixture
    1. Those mixtures in which the substances remain separate and one substance is spread throughout the other substance as small particles, droplets or bubbles are called heterogeneous mixtures.
    2. The suspensions of solids in liquids are also heterogeneous mixtures.
    3. A mixture containing two (or more).
    4. All the suspensions and colloids are heterogeneous mixtures.
    5. For Example: - Sugar and sand mixture, muddy river water, soap solution.


Mixture of Oil and water

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