Question

Zone refining is used for the purification of

Answer 1

Zone refining is used for the purification of germanium,silicon,tellurium.

Answer 2

This simple technique, in which a solid is refined by passing a liquid zone through it, has been of profound value in those technologies that call for materials of extremely high purity This process is repeated multiple times till the required purity level is reached. In this process difference between solubility of impurities in the molten and solid phases is used to concentrate impurities at the end section of the ingots.
for example.ZONE REFINING OF CADMIUM.!!