Question

On the basis of the electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is:-
A. `O_(2(g))+4H_((aq))^(+)+4e^(-)to2H_(2)O_((l))`
B. `Fe_((s))toFe_((aq))^(2+)+2e^(-)`
C. `Fe_((aq))^(2+)toFe_((aq))^(3+)+e^(-)`
D. `H_(2(g))+2OH_((aq))^(-)to2H_(2)O_((l))+2e^(-)`

Answer 1

Correct Answer - A
At cathode: `2H_((aq))^(+)+2e^(-)to2H`
`underline(2H+(1)/(2)O_(2)toH_(2)O" ")`
`2H^(+)+(1)/(2)O_(2)+2e^(-)toH_(2)O`