| I. \[S{{c}^{3+}}\]and \[T{{i}^{4+}}\] |
| II. \[M{{n}^{2+}}\]and \[F{{e}^{2+}}\] |
| III. \[F{{e}^{2+}}\]and \[C{{o}^{3+}}\] |
| IV. \[C{{u}^{+}}\]and \[Z{{n}^{2+}}\] |
A) II, III and IV
B) I, III and IV
C) I, II and IV
D) I, II and III
Correct Answer: B
Solution :
I. Electrons in\[S{{c}^{3+}}=18\]and in\[T{{i}^{4+}}=18\] II. Electrons in\[M{{n}^{2+}}=23\]and in\[F{{e}^{2+}}=24\] III. Electrons in\[F{{e}^{2+}}=24\]and in\[C{{o}^{3+}}=24\] IV. Electrons in\[C{{u}^{+}}=28\]and in\[Z{{n}^{2+}}=28\]
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