What are reactive electrodes and inert electrodes? Give examples.

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(N/A) $1$. Reactive Electrode: These electrodes participate in the electrochemical reaction during electrolysis or in a galvanic cell. They either get oxidized or reduced during the process. Example: $Cu$ electrode in a copper sulfate solution.
$2$. Inert Electrode: These electrodes do not participate in the chemical reaction (neither oxidized nor reduced) but only provide a surface for the transfer of electrons. Example: $Pt$ (Platinum) or Graphite electrodes.

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In an electrochemical cell,

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Which one of the following reactions does not take place?

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