Question

In the electrochemical cell: $H_2(g)1\text{atm}\text{. 1}{\text{H}}^{+}(1M)||C{u}^{2+}(1M)Cu(s)$ Which one of the following statements is true?

• A. ${\text{H}}_{\text{2}}$ is cathode, Cu is anode
• B. Oxidation occurs at Cu electrode
• C. Reduction occurs at ${\text{H}}_{\text{2}}$ electrode
• D. ${\text{H}}_{\text{2}}$ is anode, Cu is cathode

Answer 1

Answer: (D)

In the electrochemical cell $H_2|H^{+}||C{u}^{2+}|Cu$ oxidation takes place at hydrogen electrode and reduction takes place at copper electrode. In electrochemical cell oxidation takes place at anode and reduction takes place at cathode. So, ${\text{H}}_{\text{2}}$ electrode behaves as anode and copper electrode behaves as cathode.