The oxidation number of \( \mathrm{Fe} \) in brown ring \( \left[\m...

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The oxidation number of \( \mathrm{Fe} \) in brown ring \( \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+} \) is:
[WB (JEE) 2007; Odisha (JEE) 2008]
P
(a) 0
(b) \( +1 \)
(c) \( +2 \)
(d) \( +3 \)
W
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