Electrode potential for `Mg` electrode varies according to the equation
`E_(Mg^(2+)|Mg)=E_(Mg^(2+)|Mg)^(ϴ) -(0.059)/2 "log" 1/([Mg^(2+)])`
The graph of `E_(Mg^(2+)|Mg) vs log [Mg^(2+)]` is

Answer

B

Explanation

`E=E^(@)+(0.059)/(2)log[Mg^(2+)]`. Hence, plot of E vs log`[Mg^(2+)]` will be linear with positive slope and intercept `=E^(@)` i.e., (b).