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← ScienceWhich outcome occurs when polar molecules aggregate at an interface in an emulsion?
A)Interfacial tension decreases due to coacervation✓
B)Viscosity decreases due to shear thinning
C)Density increases due to molecular alignment
D)Thermal conductivity increases due to convection
💡 Explanation
When polar molecules aggregate at an interface, coacervation occurs because electrostatic interactions between positive and negative charges on the molecules reduce the interfacial energy. Therefore interfacial tension decreases, rather than changing viscosity, density, or thermal conductivity, which depend on different material properties.
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