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Zone Refining Video Lecture | Inorganic Chemistry for NEET
FAQs on Zone Refining Video Lecture - Inorganic Chemistry for NEET
| 1. What is zone refining? |  |
Ans. Zone refining is a purification technique used to remove impurities from a solid material, typically a metal. It involves melting a small portion of the material and then slowly moving a heat source along the length of the material, causing the impurities to migrate towards one end.
| 2. How does zone refining work? | |
Ans. Zone refining works by taking advantage of the different melting points of impurities compared to the main material. As the heat source is moved along the material, the impurities have a higher tendency to dissolve in the molten region and are carried along with it. By repeating this process multiple times, the impurities can be gradually concentrated at one end, resulting in a more purified material.
| 3. What are the advantages of zone refining? | |
Ans. Zone refining offers several advantages for purifying materials. It allows for precise control over the purification process, resulting in high purity levels. It is also a non-destructive method, meaning that the material being refined can be reused. Additionally, zone refining can be performed on a large scale, making it suitable for industrial applications.
| 4. What types of materials can be purified using zone refining? | |
Ans. Zone refining is primarily used for purifying metals and semiconductors. It is particularly effective for materials with a large difference in melting points between the impurities and the main material. Commonly purified materials include silicon, germanium, and various metals such as copper, silver, and gold.
| 5. Are there any limitations to zone refining? | |
Ans. While zone refining is a powerful purification technique, it does have some limitations. It is most effective when the impurities have a significantly higher melting point than the main material. If the impurities have a similar or lower melting point, they may not be effectively removed. Additionally, the process can be time-consuming and may require multiple iterations to achieve the desired purity level.
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