question_answer

The standard reduction potentials at 298K for the following half reactions are given against each

\[Z{{n}^{2+}}(aq)+2{{e}^{-}}\rightleftharpoons Zn(s);\,\,-0.762\,V\]

\[C{{r}^{3+}}(aq)+3{{e}^{-}}~\rightleftharpoons Cr(s);\,\,-0.740\,V\]

\[2{{H}^{+}}(aq)+2{{e}^{-}}\rightleftharpoons {{H}_{2}}(g);\,\,\,0.00\,V\]

\[F{{e}^{3+}}(aq)+2{{e}^{-}}\rightleftharpoons F{{e}^{2+}}(aq);\,\,0.770\,V\]

Which is the strongest reducing agent?

A) \[Zn\left( s \right)\]                      

B) \[Cr\left( s \right)\]

C) \[{{H}_{2}}\left( g \right)\]                     

D) \[F{{e}^{3+}}(aq)\]