Which of the following analytical tests accurately and definitively distinguishes structurally betwe — Surface Chemistry Chemistry Question

💡 Solution & Explanation

The dye test relies on solubility. A water-soluble dye will instantly dissolve and distribute uniformly throughout the continuous aqueous phase of an O/W emulsion, coloring the background. In a W/O emulsion, the continuous oil phase firmly rejects the dye, leaving the background entirely uncolored.