question_answer

Which of the following is not true for\[{{[Co{{(F)}_{6}}]}^{3-}}\]?

A)  It is paramagnetic due to the presence of 4 unpaired electrons

B)  It has coordination number of 6

C)  It is outer orbital complex

D)  It involves\[{{d}^{2}}s{{p}^{3}}\]hybridisation

Correct Answer: D

Solution :

In\[{{[Co{{(F)}_{6}}]}^{3-}}\], \[Co\]is in\[+3\]oxidation state. \[{{[Co{{(F)}_{6}}]}^{3-}}\]is an outer orbital complex showing\[s{{p}^{3}}{{d}^{2}}\]hybridisation due to the presence of weak field ligand. It is paramagnetic due to the presence of four unpaired electrons.