CBSE Class 12-science Answered
describe the method used for refining of Germenium
Asked by niharikapabba2605 | 07 Aug, 2018, 11:20: AM
Expert Answer
- Zone Refining:
- This method is very useful for obtaining metals of high purity. e.g. Germanium, silicon, gallium, and boron etc.
- This method is based upon the principle that the impurities are more soluble in the molten state than in the solid state of the metal.
- In this method, an impure metal is converted into a bar which is heated at one end with a moving circular heater, so that it forms a molten zone.
- Due to the slow-moving heater along the length of the rod, the pure metal crystallizes out of the melt whereas the impurities pass into the adjacent molten zone.
- This process is repeated for the number of times till the impurities are completely removed.
- This process is usually carried out in an inert atmosphere to avoid oxidation of the metal.
- The metals obtained from this method are highly pure.
Answered by Ramandeep | 07 Aug, 2018, 12:06: PM
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