Question
The compound $\mathrm{AgF}_2$ is unstable compound. However, if formed, the compound acts as a very strong oxidising agent. Why?
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Answer
The oxidation state of $\mathrm{Ag}$ in $\mathrm{AgF}_2$ is +2 . But, +2 is an unstable oxidation state of Ag . Therefore, whenever $\mathrm{AgF}_2$ is formed, silver readily accepts an electron to form $\mathrm{Ag}^{+}$. This helps to bring the oxidation state of Ag down from +2 to a more stable state of +1 . As a result, $\mathrm{AgF}_2$ acts as a very strong oxidizing agent.
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$
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$