A) + 2
B) + 3
C) - 2
D) - 3
Correct Answer: B
Solution :
The most stable oxidation state of Fe is + 3 due to stabler half-filled d-sub-shell. \[F{{e}^{3+}}=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}\,\,\]
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