Multiple choice

Zone melting is a process used for _____.

  1. purification of ore

  2. purification of metal

  3. concentration of ore

  4. smelting of ore

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Zone refining (or zone melting) is a technique used to purify metals by moving a molten zone through the material, which carries impurities along with it.