Question

Zone refining method is used for refining:

• A. $Al$
• B. $Ge$
• C. $Cu$
• D. $Fe$

Answer 1

The correct option is B $Ge$

Zone refining is based upon fractional crystallization as the impurity prefers to stay in the melt and on solidification only pure metals solidifies on the surface of the melt.
Metals like $Si,Ge$ and $Ga$ of high purity are purified by this method.