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← ScienceWhich outcome occurs when a surfactant increases emulsion stability?
A)Reduced interfacial surface tension appears✓
B)Increased droplet coalescence increases
C)Ostwald ripening accelerates considerably
D)Gravity segregation rate increases sharply
💡 Explanation
Reduced interfacial surface tension results from the **Marangoni effect**. This stabilizes emulsion droplets because local concentration changes induce surface tension gradients, therefore stabilizing, rather than coalescence happening because Ostwald ripening/gravity worsens without it.
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