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Is Matter Around Us Pure
Explain the following giving examples:
Colloid
Colloid: The particles of a colloid are uniformly spread throughout the solution. A colloid has the following characteristics:
(i) It is a heterogeneous mixture.
(ii) The size of particles of a colloid lies between 1–100 nm and are not visible to naked eye.
(iii) The particles of a colloid can scatter a beam of light.
(iv) The particles of a colloid cannot be separated from the mixture by filtration.
(v) The particles of a colloid do not settle when left undisturbed. Examples are smoke, milk, fog, cloud.
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Which separation techniques will you apply for the separation of the following?
Sodium chloride from its solution in water.
Which separation techniques will you apply for the separation of the following?
Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
Which separation techniques will you apply for the separation of the following?
Small pieces of metal in the engine oil of a car.
Which separation techniques will you apply for the separation of the following?
Different pigments from an extract of flower petals.
Which separation techniques will you apply for the separation of the following?
Butter from curd.
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