A) \[Fe{{\left( CO \right)}_{5}}\]
B) \[{{[Cu{{(N{{H}_{3}})}_{5}}]}^{2+}}\]
C) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
D) \[{{[Ir{{F}_{6}}]}^{3-}}\]
Correct Answer: B
Solution :
[b] \[{{\left[ Cu{{\left( N{{H}_{3}} \right)}_{5}} \right]}^{2+}}\to \] geometry with C.N.= 5 is sq. pyramidal, \[ds{{p}^{3}}\] hybridisation and \[{{d}_{{{x}^{2}}}}_{-{{y}^{2}}}\]orbital is used in hybridisation. [a] \[Fe{{\left( CO \right)}_{5}}\to {{d}_{z}}2s{{p}^{3}}\] [b] \[[Co{{(N{{H}_{3}})}_{6}}^{2+}\to {{d}^{2}}s{{p}^{3}}\] [d] \[{{\left[ Ir{{F}_{6}} \right]}^{3-}}\to {{d}^{2}}s{{p}^{3}}\]
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