(i) ( Fe(s) / Fe^ 2+ (aq) | Cu^ 2+ (aq) / Cu(s) ) (ii) ( Ag(s) / Ag^ + (aq) | Zn^ 2+ (aq) / Zn(s) ) দেওয়া আছে, ( begin array l E_ Fe / Fe^ 2+ ^ 0 =0.44 ~V, E_ Cu^ 2+ / Cu ^ 0 =0.34 ~V E_ Ag / Ag^ + ^ 0 =-0.79 ~V, E_ Zn^ 2+ / Zn ^ 0 =-0.76^ 1 ~V end array )