Surface Chemistry

Short Answer Type

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Lyophilic sols are reversible whereas lyophobic sols are irreversible. Why?

Answer:

Lyophilic : Reversible, because on evaporating the liquid, the residue left will passes into colloidal state on addition of liquid.

Lyophobic : Irreversible, because on evaporating the liquid, the residue left cannot be converted into solution on mere addition of liquid.

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