Which of the following electrodes will act as anodes, when connected to Standard Hydrogen Electrode ?

Options

A. `Al//Al^(3+) " "E^@=-1.66V`
B. `Fe//Fe^(2+) " "E^@=-0.44V`
C. `Cu//Cu^(2+) " "E^@=-0.34V`
D. `F_2(g)2F^(-)(aq) " "E^@=+2.87V`

Answer

A, B

Explanation

The electrodes having negative electrode potentials are stronger reducing agents than `H_2` gas and therefore , will acts as anodes.