In the complex ion $[Cr(H_2O)_6]^{3+}$,the coordination number of $Cr$ is:

The set which does not have any ambidentate ligand$(s)$ is:

Which of the following is a bidentate negatively charged ligand?

$A$ coordination complex compound of cobalt has a molecular formula containing five ammonia molecules,one nitro group,and two chlorine atoms for one cobalt atom. One mole of this compound produces three moles of ions in an aqueous solution,and upon reacting with an excess of $AgNO_3$,it forms $AgCl$ precipitate. The ionic formula for this complex would be:

In which of the following compounds,the transition metal is in an oxidation state of zero?

Which of the following compounds contains complex anions?