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Is Matter Around Us Pure

‘Pure’ Word means that there is no mixing in a substance. But according to scientific language all things are mixture of so many substances, not of single one. That’s why they are not pure.

E.g., Milk, water, fat, etc.

  1. Pure substances means that all elements have same chemical properties.
  2. A pure substance is made up of same kind of elements.

Substance : A Substance is a kind of matter that cannot be separated into other kind of matter by any physical process. A pure substance is made up of same kind of elements.

What is a mixture ?

It is a substance in which two or more substance (element or compound) are simply mixed together in any proportion. Examples : The air is a mixture of oxygen, nitrogen, argon, carbon dioxide and water vapour.

Types of Mixture : Mixture is of tow types :

(i) Homogenous mixture

(ii) heterogenous mixture

Homegenous Mixture : It has no visible boundaries of separation between the various constituents, so they are called homogenous mixture

Example : Sugar in water. It has a uniform composition throughout its mass.

Heterogenous Mixture : these types of mixture has visible boundaries of separation between the various constituents.

Example : Mixture of sugar and sand. It does not have a uniform composition throughout its mass.

Solution : A solution is a homogenous mixture of two or more substances. E.g., Nimboo pani, soda water.

Solution : A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it is called the solvent. The component of the solution that is dissolved in the solvent called the solute.

  Solution

          Solute                                                                                                      Solvent

(Substance dissolved) (Substance in which dissolved)

E.g., Sugar + water = sugar solution

True
ColloidalSuspension
1. Size of solute particles smallest. < 10 m raised to -91. Size of solute particles bigger than true but smaller then suspension. In between 10 raised to -9 to 10 m raised to -61. Size of particles biggest. > 10 m raised to -6
2. Solute particles can’t be seen with naked eye.2. Solute particles can’t be seen with Naked eye.2. Can be seen with naked eye.
3. Homogenous Mixture.3. Seems homogenous but actually heterogenous Mixture.3. Heterogenous Mixture.

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