The compound AgF2 is unstable compound. However, if formed, the compound acts as a very strong oxidizing agent. Why?
The oxidation state of AgF2 is + 2. But, + 2 is an unstable oxidation state of Ag.
Therefore, whenever AgF2 is formed, silver readily accepts an electron to form Ag +. This helps to bring the oxidation state of Ag down from + 2 to a more stable state of + 1. As a result, AgF2 acts as a very strong oxidizing agent.
Oxidation state of AgF2 :-
Let the oxidation state of Ag be x.
x + 2(-1) = 0 {oxidation state of F = -1}
x = 1