The oxidation number of $\mathrm{Fe}$ in $\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{5}…

The oxidation number of $\mathrm{Fe}$ in $\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NO}^+ight]$ is
  1. $+2$
  2. $+1$
  3. $+3$
  4. $-2$

Solution

Let \(\mathrm{X}\) be the oxidation number of \(\mathrm{Fe}\) in \(\mathrm{Na}_2\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}^+ight]\). The Na atoms have oxidation number of \(+1\). The $\mathrm{NO}+$ group has oxidation number of 1. The \(\mathrm{CN}\) group has oxidation number of \(-1\). \(\begin{aligned} & 2(+1)+X+5(-1)+1=0 \\ & 2+X-5+1=0 \\ & X-2=0 \\ & X=+2 \end{aligned}\) The oxidation number of \(\mathrm{Fe}\) in \(\mathrm{Na}_2\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}ight]\) is \(+2\).

Asked in: JEE-TOPICTESTS-CHEMISTRY

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