A) \[T{{i}^{2+}}\] and \[{{V}^{2+}}\]
B) \[F{{e}^{2+}}\] and \[C{{u}^{2+}}\]
C) \[C{{r}^{2+}}\] and \[F{{e}^{2+}}\]
D) \[C{{O}^{2+}}\] and \[T{{i}^{2+}}\]
Correct Answer: C
Solution :
\[C{{r}^{2+}}(Z=24):\] \[[Ar]3{{d}^{4}}4{{s}^{0}};\]four unpaired electrons \[F{{e}^{2+}}(Z=26):\] \[[Ar]3{{d}^{6}}4{{s}^{0}};\] four unpaired electrons \[C{{r}^{2+}}\] and \[F{{e}^{2+}}\] have same number of unpaired electrons hence they have the same value of magnetic moment.
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