A) \[C{{u}^{2+}}>N{{i}^{2+}}>C{{o}^{2+}}>F{{e}^{2+}}\]
B) \[C{{u}^{2+}}>F{{e}^{2+}}>N{{i}^{2+}}>C{{o}^{2+}}\]
C) \[N{{i}^{2+}}>C{{o}^{2+}}>F{{e}^{2+}}>C{{u}^{2+}}\]
D) \[C{{u}^{2+}}>N{{i}^{2+}}>C{{o}^{2+}}>F{{e}^{2+}}\]
Correct Answer: D
Solution :
When cations have some charge but number of \[d-\]electrons are different then the stability (or CFSE) decrease with increase in the number of \[d-\]electrons. Therefore, the correct order is: \[F{{e}^{2+}}>C{{o}^{2+}}>N{{i}^{2+}}>C{{u}^{2+}}\]You need to login to perform this action.
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