JEE Main Chemistry question
Not in JEE Main or NEET syllabus
When a sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are
| | Cathode | Anode | |---|---|---| |a)| Pure zinc | Pure copper | |b)| Impure sample | Pure copper | |c)| Impure zinc | Impure sample | |d)| Pure copper | Impure sample |
Answer: (D)
Solution
In electrorefining of copper, the impure sample is made the anode (it dissolves, releasing into solution while zinc and
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