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Chemistry CBSE Live product
Class 8 (2025-26)
Nature of matter: Elements, compounds and mixtures
Revision II - Nature of matter: Elements, compounds and mixtures
9.
Types of matter
Question:
5
m.
Answer the
following questions given below
:
1.
Compare pure and impure substance with an example.
i.
Pure substance
:
A substance made up of two or more kind of particles
A substance made up of only one kind of particles
A substance made up of only one mixture
A substance made up of different kind of particles
Properties
:
Has variable composition and same properties throughout
Has fixed composition and same properties throughout
Has variable composition and properties changes
Has fixed composition and different properties
Example:
Iron, air, and carbon dioxide
Iron, gold, and salt solution
Iron, copper, and carbon dioxide
Gold, nitrogen, and milk
ii.
Impure substance
:
A substance made up of two or more kind of particles
A substance made up of single atom
A substance made up of only one kind of particles
A substance made up of one compound
Properties
:
Has fixed composition and same properties throughout
Has variable composition and same properties throughout
Has same composition and properties
Has variable composition and components can retain the properties
Example:
Gold, air, and water
Sodium, soil, and vinegar
Air, vinegar, and soil
Soil, oxygen, and milk
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