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Class 9th Science || Menu
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  • Matter in Our Surroundings
  • Is Matter Around Us Pure
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Notes Class 9 Science Chapter 2 Is Matter Around Us Pure

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Notes For All Chapters Science Class 9

Facts that Matter

matter-around-us-pure-cbse-notes-class-9-science-1
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
matter-around-us-pure-cbse-notes-class-9-science-4
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
matter-around-us-pure-cbse-notes-class-9-science-8

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