How many donor groups (donor atoms) are present in diethylene triamine?

Identify the total number of complexes from the following list that contain only monodentate ligands:
$(a)$ $[Ni(CN)_4]^{2-}$ (Tetracyanonickelate $(II)$ ion)
$(b)$ $K_3[AlF_6]$ (Potassium hexafluoroaluminate $(III)$)
$(c)$ $[Cu(NH_3)_4]^{2+}$ (Tetraamminecopper$(II)$ ion)
$(d)$ $K_3[Al(C_2O_4)_3]$ (Potassium trioxalatoaluminate $(III)$)

The primary valence of the metal ion in the coordination compound $K_2[Ni(CN)_4]$ is

The number of coordinate bonds in $[Co(NH_3)_6]Cl_3$ is ...... .

The coordination number of a central metal atom in a complex is determined by:

Mohr salt is prepared from an equimolar solution of: