Which of the following is an ambidentate ligand?

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

Which complex among the following gives a white precipitate on treatment with an aqueous solution of barium chloride?

Explain the following term with an example: Tridentate ligands.

Number of ambidentate ligands among the following is ................ $NO_2^{-}$,$SCN^{-}$,$C_2O_4^{2-}$,$NH_3$,$CN^{-}$,$SO_4^{2-}$,$H_2O$.

The coordination number and the oxidation state of the element $E$ in the complex $[E(en)_2(C_2O_4)]NO_2$ (where $en$ is ethylene diamine) are,respectively: