A) +2
B) +1
C) +3
D) -2
Correct Answer: A
Solution :
[a] \[{{\overset{+2}{\mathop{Na}}\,}_{2}}{{\left[ \overset{+2}{\mathop{Fe}}\,{{\overset{-5}{\mathop{(CN)}}\,}_{5}}\overset{+1}{\mathop{NO}}\, \right]}^{2-}}\] Oxidation state of Fe = +2
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