Copper can best be purified by
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- A Roasting the impure copper in a blast furnace
- B Heating the oxide with coke
- C Electrolyzing a copper (ll) salt solution using the impure copper as the anode
- D Converting the impure copper to a trioxonitrate (V)
- E Washing the impure copper with sodium hydroxide solution
Correct Answer: Option C
Explanation:
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