$H_2N - CH_2 - CH_2 - NH_2$ acts as a:

Ethylenediamine $(en)$ is a:

Which among the following statements is true for $[Pt(NH_3)_2 Cl_2]$?

Find the total number of moles of donor atoms present in one mole of trioxalatocobaltate$(III)$ ion.

If the addition of $AgNO_3$ to a solution of $Co(NH_3)_5Cl_3$ results in the precipitation of $AgCl$ corresponding to two ionizable chloride ions,it means that ..............

For the complexes $(A) \ CoCl_3 \cdot 6NH_3$,$(B) \ CoCl_3 \cdot 5NH_3$,and $(C) \ CoCl_3 \cdot 4NH_3$,if the secondary valency of $Co$ is $6$,what is its primary valency in each case?