Question:
$\mathrm{Fex}_{2}$ and $\mathrm{Fey}_{3}$ are known when $\mathrm{x}$ and $\mathrm{y}$ are
Correct Option: 1
Solution:
$\underset{\text { (Unstable) }}{2 \mathrm{FeI}_{3}} \longrightarrow \underset{\text { (Stable) }}{2 \mathrm{FeI}_{2}}+\mathrm{I}_{2}$
Due to strong reducing nature of $\Gamma$
$2 \mathrm{Fe}^{3+}+2 \mathrm{I}^{-} \longrightarrow 2 \mathrm{Fe}^{2+}+\mathrm{I}_{2}$
remaining halides of $\mathrm{Fe}^{2+} \& \mathrm{Fe}^{3+}$ are stable.
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