A) \[T{{i}^{3+}}>T{{i}^{4+}}\]
B) \[M{{n}^{2+}}>M{{n}^{3+}}\]
C) \[F{{e}^{2+}}>F{{e}^{3+}}\]
D) \[C{{u}^{+}}>C{{u}^{2+}}\]
Correct Answer: B
Solution :
\[M{{n}^{2+}}(3{{d}^{5}})\]is more stable then \[M{{n}^{3+}}(3{{d}^{4}})\]. due to half-filled orbitals.
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