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Why is Tyndall effect generally not seen in a true solution?

Answer and explanation

Correct answer: Particles are very small

The Tyndall effect is the visible scattering of a beam of light by particles in a mixture. In a true solution, the solute particles are extremely small and are distributed at the molecular or ionic scale. They are too small to scatter ordinary light strongly enough for the path of the beam to become visible under normal conditions.

Therefore option A is correct: the particles are very small. The explanation is about particle size, not about the solution being black or solid. Heavy particles are not the defining reason, and a true solution is generally a homogeneous liquid, although solutions can exist in other states. Colloids show the Tyndall effect more clearly because their particles are larger than those in true solutions.

Related tags

ChemistryNature-Of-MatterClass-11

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