On the basis of the following (E^ ) values, the strongest oxidizing agent is :- ( aligned & [ Fe ( CN )₆ ]⁴⁻ [ Fe ( CN )₆ ]³⁻+e⁻¹, E ^ =-0.35 ~V & Fe ²⁺ Fe ³⁺+e⁻¹ ; E ^ =-0.77 ~V aligned )

Step-by-step solution

Key Idea : Oxidised form + ne e⁻ Reduced form The substances which have lower reduction substances which have higher reduction potential are stronger oxidising agent. array l [ Fe ( CN )₆ ]³⁻+e⁻ [ Fe ( CN )₆ ]⁴⁻ ; E^ =0.35 ~V Fe ³⁺+e⁻ Fe ²⁺ ; E^ =0.77 ~V array The reduction potential of Fe ³⁺ / Fe ²⁺ is higher, hence Fe ³⁺ is strongest oxidising agent.