Study MaterialsCBSE NotesIs Matter Around Us Pure Class 9 Notes Science Chapter 2

Is Matter Around Us Pure Class 9 Notes Science Chapter 2

 

CBSE Class 9 Science Notes Chapter 2 Is Matter Around Us Pure

Facts that Matter

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    matter-around-us-pure-cbse-notes-class-9-science-2
    Compounds
    The compound is a pure substance made up of two or more elements combined chemically in a definite ratio.

    Characteristics:

    • The properties of compound differ from those of its constituents.
    • Compound has fixed melting point and boiling point.
    • Compound is a homogeneous substance.
    • Constituent elements can be separated by chemical process.

    Mixtures
    It is made up of two or more elements or compounds mixed in any ratio/proportion.

    Properties:

    • It may be homogeneous or heterogeneous.
    • The properties of constituent substances are retained.
    • No new compound is formed.
    • Elements can be separated by simple physical processes.
    • It does not have a fixed melting and boiling point.

    Separation of Mixtures:
    matter-around-us-pure-cbse-notes-class-9-science-3
    Physical and Chemical Change
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    Solution
    It is a homogeneous mixture of two or more substances.
    matter-around-us-pure-cbse-notes-class-9-science-5
    matter-around-us-pure-cbse-notes-class-9-science-6
    matter-around-us-pure-cbse-notes-class-9-science-7

    Different Types of Colloids
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