The covalency of $Al$ in $[AlCl(H_2O)_5]^{2+}$ is:

Which of the following is a bidentate ligand?

The coordination number of cobalt in the complex $[Co(en)_2Br_2]Cl_2$ is

State the limitations of Werner's coordination theory.

The molecular formula of a coordination complex is $CoH_{12}O_6Cl_3$. When one mole of this aqueous solution of the complex is reacted with an excess of aqueous $AgNO_3$ solution,$3$ moles of $AgCl$ are formed. What is the correct formula of the complex?

What is the primary and secondary valency of the central metal in the complex $[Co(C_2O_4)_2(H_2O)_2]^{-}$?