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

Which of the following ligands is expected to be bidentate?

In the complex ion $[Co(NH_3)_6]^{3+}$,the $NH_3$ molecules are linked to the metal atom by .......

$A$ group of atoms can function as a ligand only when

The number of neutral molecules or negative groups attached to the central metal atom in a complex ion is called:

Which of the following pairs of complexes gives pale yellow and white precipitates respectively when their aqueous solutions are treated with $0.1 \ M \ AgNO_3$?