In which of the following species is the oxid | vedclass

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(C) Step $1$: Calculate the oxidation number for each species.Step $2$: For $IF_3$, $x + 3(-1) = 0 \implies x = +3$.Step $3$: For $IF_5$, $x + 5(-1) =

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$I_3^-$

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(C) Step $1$: Calculate the oxidation number for each species.Step $2$: For $IF_3$, $x + 3(-1) = 0 \implies x = +3$.Step $3$: For $IF_5$, $x + 5(-1) = 0 \implies x = +5$.Step $4$: For $I_3^-$, let the oxidation number of iodine be $x$. The total charge on the triiodide ion is $-1$. Thus, $3x = -1$, which gives $x = -1/3$.Step $5$: For $IF_7$, $x + 7(-1) = 0 \implies x = +7$.Step $6$: Since $-1/3$ is a fractional value, the oxidation number of iodine in $I_3^-$ is fractional.

In which of the following species is the oxidation number of iodine fractional?

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