Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

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Class 9 : Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

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Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Compounds
A 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 a 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 after mixing.
  • Constituents of a mixture can be separated by simple physical processes.
  • It does not have a fixed melting and boiling point.

Question 1:Mixture can be       

➢ Separation of Mixtures
Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

➢ Physical and Chemical Change
Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Solution
It is a homogeneous mixture of two or more substances.
Table: Difference between Solute and Solvent.
Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Question 2:In sugar solution,       

Table: Difference between Suspension and Collodial Solution

Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

Short Notes - Is Matter Around Us Pure, Science, Class 9 Class 9 Notes | EduRev

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