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  4. Based on data given below for the electrode potential, reducing power of Fe2 +,Al and Br- will increase in the order Br2(.aq.)+2e- arrow 2Br-(.aq.);Eo=+1.08V Al3 +(.aq.)+3e- arrow Al(.s.);Eo=-1.66V Fe3 +(.aq.)+e- arrow Fe+ 2(.aq.);Eo=+0.77V

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Q. Based on data given below for the electrode potential, reducing power of $Fe^{2 +},Al$ and $Br^{-}$ will increase in the order

$Br_{2}\left(\right.aq\left.\right)+2e^{-} \rightarrow 2Br^{-}\left(\right.aq\left.\right);E^{o}=+1.08V$

$Al^{3 +}\left(\right.aq\left.\right)+3e^{-} \rightarrow Al\left(\right.s\left.\right);E^{o}=-1.66V$

$Fe^{3 +}\left(\right.aq\left.\right)+e^{-} \rightarrow Fe^{+ 2}\left(\right.aq\left.\right);E^{o}=+0.77V$

NTA AbhyasNTA Abhyas 2020Electrochemistry

Solution:

Reducing power, i.e. the tendency to lose electrons increases as the reduction potential decreases.