Copper is refined by
1). roasting
2). oxidation
3). electrolysis
4). zone refining
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1. Question 15.5:Define the term polymerisation.
2. Which of the following metals is used in Space Crafts to withstand high temperatures ?
3. The fiber least prone to catch fire is
4. Radioactive disintegration of uranium ultimately results in formation of
5. Which of the following is a commercial source of energy?
6. Cinnabar is an ore/mineral of
7. Question 6.18:What is the role of cryolite in the metallurgy of aluminium?