A) \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
B) \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
C) \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
D) \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
Correct Answer: A
Solution :
[a]Electronic configuration | No. of unpaired electrons | |
\[C{{o}^{2+}}\] | \[{{d}^{7}}\] | 3 |
\[C{{r}^{2+}}\] | \[{{d}^{4}}\] | 4 |
\[M{{n}^{2+}}\] | \[{{d}^{5}}\] | 5 |
\[F{{e}^{2+}}\] | \[{{d}^{6}}\] | 4 |
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