question_answer 1)

  Which of the following electrodes will act as anodes, when connected to standard hydrogen electrode? (a) \[Al/A{{l}^{3+}}\]                      \[{{E}^{O-}}=1.66\]          (b) \[Fe/F{{e}^{2+}}\]                    \[{{E}^{O-}}=-0.44\] (c) \[Cu/C{{u}^{2+}}\]                    \[{{E}^{O-}}=+0.34\] (d) \[{{F}_{2}}(g)2{{F}^{-}}(aq)\]               \[{{E}^{O-}}=+2.87\]

Answer:

  (a, b) Metals with negative standard reduction potential like Al and Fe will act as anode when connected to standard hydrogen electrode.