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(C) Surfactants are molecules that contain both a hydrophilic (polar) head and a hydrophobic (non-polar) tail. In an aqueous solution,at low concentra

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$(C)$

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(C) Surfactants are molecules that contain both a hydrophilic (polar) head and a hydrophobic (non-polar) tail. In an aqueous solution,at low concentrations,surfactant molecules exist as individual monomers. As the concentration increases to the Critical Micellar Concentration $(CMC)$,the surfactant molecules begin to aggregate to form spherical structures called micelles. In a micelle,the hydrophobic tails are directed towards the center (away from water),and the hydrophilic heads are directed towards the outside (in contact with water). Looking at the provided options,image $(C)$ correctly depicts the formation of a micelle where the non-polar tails are clustered together in the center and the polar heads are facing the aqueous medium.

Identify the correct molecular picture showing what happens at the critical micellar concentration $(CMC)$ of an aqueous solution of a surfactant $(\circ \text{ polar head; } \sim \text{ non-polar tail; } \bullet \text{ water})$.

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