(C) Zone refining is a technique used to purify semiconductors and other materials. It is based on the principle that impurities are more soluble in t

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(C) Zone refining is a technique used to purify semiconductors and other materials. It is based on the principle that impurities are more soluble in the molten state than in the solid state. $Ge$ (Germanium),$Si$ (Silicon),and $Ga$ (Gallium) are typically purified using this method to obtain high-purity semiconductors.