Zone refining is a crucial technique for producing ultra-pure semiconductors such as Germanium and S — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Zone refining (fractional crystallization) is based on the principle that impurities are more soluble in the melt (molten state) than in the solid state of the metal. As the molten zone moves, pure metal crystallizes out while impurities remain dissolved in the advancing melt.