Using the standard electrode potentials of the redox couples given below, which of the following is the strongest oxidizing agent?

E values: Fe3+/Fe2+=+0.77 V 
I2(s)/I-=+0.54 V
Cu2+/Cu=+0.34 V
Ag+/Ag=0.80 V 

1. Fe3+
2. I2(s)
3. Cu2+
4. Ag+

Hint: High reduction potential value strongest is the oxidisng agent
The given values are as follows:
E° values of
Fe3+/Fe2+=+0.77V
I2(s)/I-=+0.54V
Cu2+/Cu=+0.34V
Ag+/Ag=+0.80V
Since, E° of the redox couple Ag+/Ag is the most positive, i.e., 0.80 V, therefore Ag+ is the strongest oxidising agent.