A) \[{{V}^{+3}}\]
B) \[M{{n}^{+3}}\]
C) \[F{{e}^{+3}}\]
D) \[C{{u}^{+2}}\]
Correct Answer: C
Solution :
\[F{{e}^{+3}}\]| S. No. | Outer configuration | No. of unpaired e- | Color of ion | Magnetic moment |
| \[{{V}^{+3}}\] | \[3{{d}^{2}}\] | 2 | Green | 2.76 |
| \[M{{n}^{+3}}\] | \[3{{d}^{4}}\] | 4 | Violet | 1.9 |
| \[F{{e}^{+3}}\] | \[3{{d}^{5}}\] | 5 | Yellow | 5.96 |
| \[C{{u}^{+2}}\] | \[3{{d}^{9}}\] | 1 | Blue | 1.9 |
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