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In a colloid, how is the size of dispersed particles compared with that in a solution and a suspension?

Answer and explanation

Correct answer: Larger than in a solution and smaller than in a suspension

Particle size provides a useful physical distinction among mixtures. True-solution particles are molecular or ionic in size and are the smallest; suspension particles are much larger and may settle under gravity; colloidal particles have an intermediate size between these two ranges. Because of this intermediate size, a colloid can scatter light and generally does not settle rapidly, although its particles may not be visible individually. Therefore option D is correct. Option A reverses the comparison, option B incorrectly makes colloids larger than suspensions, and option C has no physical meaning because dispersed particles are not zero-sized.

Related tags

ColloidParticle SizeMixtureNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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