Q.

Lyophilic colloids are called reversible colloids because

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a

they can be easily precipitated from the colloidal system

b

one formed, the dispersion medium and the dispersed phase cannot be separated

c

they can be again prepared by mixing residue in dispersion medium even after drying 

d

they are prepared by special reversible reaction

answer is B.

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Detailed Solution

An important characteristic of these sols is that if the dispersion medium is separated from the dispersed phase, the sol can be reconstituted by simply remixing with the dispersion medium. That is why these sols are also called reversible sols.

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