Which among the following is an ambidentate ligand?

Assertion : When $NO$ reacts with $FeSO_4$,a brown coloured complex is formed.
Reason : In the complex,the coordination number of $Fe$ is $6$.

In complex compounds,the metal-ligand bond is:

The coordination number and oxidation state of $Cr$ in $K_3[Cr(C_2O_4)_3]$ are respectively

In the complex ion $[Fe(C_2O_4)_3]^{3-}$,the coordination number of $Fe$ is

What is the total number of moles of ions produced when one mole of $[Co(NH_3)_3Cl_3]$ is completely dissociated?