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Tyndall effect is more effectively shown by:

1. true solution
2. lyophilic colloid
3. lyophobic colloid
4. suspension

Correct answer: lyophobic colloid

Solution

The Tyndall effect is most pronounced for lyophobic colloids, whose large, weakly-solvated particles have a refractive index very different from the medium and scatter light strongly. Lyophilic sols scatter weakly; true solutions and suspensions do not show it the same way.

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