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CBSE Video lectures for download

     

=Substance and Type of Substances

=Mixture, Homogeneous Mixtures, Heterogeneous mixtures

=Solution, Properties of Solution

=Suspension, Properties of Suspension

=Colloid, Properties of Colloid

=Tyndall Effect

=Method of Separating the Component of Mixture

=obtain the coloured component (dye) from a ink

=Use of separating funnel

=Sublimation

=Centrifugation

=Chromatography

=Method of Simple Distillation

=Method of Fractional Distillation

=Obtain Different Gases from Air

=Crystallisation, Application of Crystallisation

=Physical Change

=Chemical Change

=Diagram of water purification system

=Differentiate between mixtures and compounds.

=Classification table of matter.

 

What is a solution? Write its properties.

What is a solution? Write its properties.
Answer: A solution is a homogeneous mixture of two or more substances.  A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it (usually the component present in larger amount) is called the solvent. The component of the solution that is dissolved in the solvent (usually present in lesser quantity) is called the solute.
Properties of a solution
• A solution is a homogeneous mixture.
• The particles of a solution are smaller than 1 nm (10-9 metre) in diameter. So, they cannot be seen by naked eyes.                                                                                                              
• Because of very small particle size, they do not scatter a beam of light passing through the solution. So, the path of light is not visible in a solution.
• The solute particles cannot be separated from the mixture by the process of filtration. The solute particles do not settle down when left undisturbed,
that is, a solution is stable.

Concentration of Solution: Concentration of a solution is the amount of solute present in the given amount of solution. The concentration of a solution can be determined by the following ways:
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What is a solution? Write its properties.

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