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Explain types of collides

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Explain types of collides
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Gaurav Seth 4 years, 1 month ago

On the basis of nature of interaction between dispersed phase and dispersion medium, colloids can be divided into two forms:

(a) Lyophilic Colloids: As the name lyophilic (liquid-loving or solvent attracting) indicates, lyophilic colloids are the colloids exhibiting a strong interaction between the two phases.
The substances like gum, gelatin, starch, when mixed with a suitable liquid as the dispersion medium, directly form the colloidal sol which is also named as lyophilic sol.

(b) Lyophobic Colloids: Lyophobic' means 'liquid hating', which indicates that in these sols there is little or no interaction between the two phases. Substances like metals and their sulphides, when simply mixed with the dispersion medium do not form colloidal sol. They cannot be prepared by simply mixing the two phases. Such substances are called Lyophobic Sols.

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