1
Question
Which of the following is used as a method of purification for silicon?
Which of the following is used as a method of purification for silicon?
Open in App
Solution
The correct option is C Zone refining
- Zone refining is based on the principle that the impurities are more soluble in the melt than in the solid state of the metal.
- A mobile heater surrounding the rod of impure metal is fixed at its one end. The molten zone moves along with the heater which is moved forward. As the heater moves forward, the pure metal crystallizes out of the melt left behind and the impurities pass on into the adjacent new molten zone created by movement of heaters.
- The process is repeated several times and the heater is moved in the same direction again and again. Impurities get concentrated at one end. This end is cut off.
- This method is very useful for producing semiconductor and other metals of very high purity, e.g., germanium, silicon, boron, gallium, and indium.
- Zone refining is based on the principle that the impurities are more soluble in the melt than in the solid state of the metal.
- A mobile heater surrounding the rod of impure metal is fixed at its one end. The molten zone moves along with the heater which is moved forward. As the heater moves forward, the pure metal crystallizes out of the melt left behind and the impurities pass on into the adjacent new molten zone created by movement of heaters.
- The process is repeated several times and the heater is moved in the same direction again and again. Impurities get concentrated at one end. This end is cut off.
- This method is very useful for producing semiconductor and other metals of very high purity, e.g., germanium, silicon, boron, gallium, and indium.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
