When CuSO4 is electrolyzed in aqueous solution using copper electrodes, then the substance which deposits at the cathode is:
Correct answer: A. Copper metal
- A. Copper metal
- B. Copper ions
- C. Hydrogen
- D. Oxygen
Explanation
Since reduction takes place cupric ions present in the electrolyte gain two electrons and get converted into copper metal. Copper metal is deposited on the copper electrode since reduction reaction occurs at the cathode.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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