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Is Matter around us pure?
Q.4: Explain the following giving examples:
(a) Saturated solution
(b) Pure substance
(a) The solution which contains the maximum concentration of a solute that is dissolved in a solvent is called a saturated solution.
(b) A substance that has a fixed structure and is made up of only one kind of particle is called a pure substance. For example, silver, iron, etc.
(c) The colloidal solution is the solution in which the particles of a colloid are uniformly spread throughout the solution. The colloidal solution is a heterogeneous mixture. The particles of colloids are so small that is not visible to naked eyes. For example, milk is a colloidal solution.
(d) A suspension is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium. For example, a mixture of chalk and water.
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