A) + 6
B) + 4
C) + 3
D) + 2
Correct Answer: D
Solution :
\[\overset{\,\,\,*\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{{{K}_{4}}[Fe{{(CN)}_{6}}]}}\,\] \[1\times 4+x+(-1\times 6)=0,\] \[4+x-6=0\] \[x=+\,2\]. In this complex compound Iron show + 2 oxidation state.
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