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Question

Which of the following colloids are solvent hating?

A
lyophilic
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B
lyophobic
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C
hydrophilic
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D
none of these
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Solution

The correct option is B lyophobic
Lyophobic colloids: In these colloidal solution there is no affinity between particles of the dispersed phase and the dispersion medium.
These sols are readily ​precipitated (or coagulated)​ on addition of small amounts of electrolytes, by heating or by shaking​. As a result, they are not stable​.

Once precipitated, they do ​not give back the colloidal sol​ by simple addition of ​the dispersion medium. Hence, they are known ​as irreversible sols.​

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