question_answer

In the reaction                 \[Cu(s)+2A{{g}^{+}}(aq)\to C{{u}^{2+}}(aq)+2Ag(s)\]                 The reduction half-cell reaction is                             [AIIMS 1997]

A)                 \[Cu+2{{e}^{-}}\to C{{u}^{2-}}\]               

B)                 \[Cu-2{{e}^{-}}\to C{{u}^{2+}}\]

C)                 \[A{{g}^{+}}+{{e}^{-}}\to Ag\]   

D)                 \[Ag-{{e}^{-}}\to A{{g}^{+}}\]