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  4. Which substance is not used for preparing lyophilic sols?

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Q. Which substance is not used for preparing lyophilic sols?

ManipalManipal 2010Surface Chemistry

Solution:

Metal sulphides are not used to prepare lyophilic sols as lyophilic sols are prepared by just dissolving substance into water eg, sols of starch, gum and gelatin are prepared by dissolving them in water. Thus, they are lyophilic.