Zone Refining
Trending Questions
You are an alchemist who is trying to remove hard lead impurity from Crude silver. You can only use thermal refining by using a blast of air. What would you use?
Linz-Donawitz process
Van Arkel-de Boer Refining
Mond’s process
Cupellation
You are an alchemist who is trying to remove hard lead impurity from Crude silver. You can only use thermal refining by using a blast of air. What would you use?
Van Arkel-de Boer Refining
Mond’s process
Cupellation
Linz-Donawitz process
- True
- False
- Cupellation
- Zone refining
- Poling
- Electrolytic process
- True
- False
- Ge
- Si
- Ga
- Se
Explain:
Zone refining
Column chromatography .
How are metals used as semiconductors refined? What is the principle of the method used like germanium, silicon etc?
Match the items of Column I with the items of Column II and assign the correct code.
Column IColumn IIA. Coloured bands1. Zone refiningB. Impure metal to volatile complex2. Fractional distillationC. Purification of Ge and Si3. Mond′s processD. Purification of mercury4. Chromatography5. Liquation
Codes
A B C D A B C D
(a) 1 2 4 5 (b) 4 3 1 2
(c) 3 4 2 1 (d) 5 4 3 2
- ultra pure boron
- ultra pure lead
- ultra pure silicon
- all