properties of solution,suspension sodium chloride, Colloid
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(a) Properties of a colloid (any four)
(i) A colloid is a heterogeneous mixture.
(ii) The size of particles of a colloid is too small to be individually seen by naked eyes.
(iii) Colloids are big enough to scatter a beam of light passing through it and make its path visible.
(iv) They do not settle down when left undisturbed, that is, a colloid is quite stable.
(v) They cannot be separated from the mixture by the process of filtration. But, a special technique of separation known as centrifugation can be used to separate the colloidal particles.
Two properties in which colloids differ from suspension are (ii) and (iii) as the particles of a suspension are large enough to be observed with a naked eye and these particles settle down well when the mixture is left undisturbed.
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