Copper can best be purified by
...Copper can best be purified by
roasting the impure copper in a blast furnace
heating the oxide with coke
electrolyzing a copper (ll) salt solution using the impure copper as the anode
converting the impure copper to a trioxonitrate (V)
washing the impure copper with sodium hydroxide solution
Correct answer is C
No explanation has been provided for this answer.
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