A) \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
B) \[{{[Cu{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
C) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
D) \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
Correct Answer: C
Solution :
\[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]is diamagnetic ion due to absence of unpaired electron.
Its geometry is octahedral.
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