NEET levelSingle correct optionDifficulty 1 of 3mt166
Zone refining is based on the principle that
Aimpurities are more soluble in the solid metal than in the melt
Bimpurities are more soluble in the molten metal than in the solid metal
Cthe metal forms a volatile compound which decomposes on a hot filament
Dimpurities are more volatile than the metal and distil off
Answer: B
In zone refining a narrow molten zone is moved along a rod. The impurities prefer the melt, so they travel with the molten zone to one end of the rod, which is cut off.