Question

CH-2 Chemistry class 9
Q: Explain the following giving examples:
a) Saturated solution
b) Pure substance
c) Colloid
d) Suspension
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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

a) The term saturated solution is used in chemistry to define a solution in which no more solvent can be dissolved. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas.

 

Eg: Saltwater

(b) Pure substance: A material that is composed of only one type of particle.

Eg: Gold, oxygen and water.

(c)   Colloids are defined as a mixture where one of the substances is split into very minute particles dispersed throughout a second substance. The minute particles are known as colloidal particles. Colloids are heterogeneous mixtures in which solute particles’ size is intermediate between those in true solutions and those in suspensions and are big enough to scatter light.

Eg: Gels, sols and emulsions.  

d) Suspension: A suspension is a heterogeneous mixture in which solute-like particles settle out of a solvent-like phase sometime after their introduction. We apply the word suspension when particles are big enough to eventually settle.

Eg: wheat flour and water.

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