In the $SCN$ ligand,if $N$ is bonded to the central metal atom,the name of the ligand is.....

One mole of the complex compound $Co(NH_3)_5Cl_3$ gives $3$ moles of ions on dissolution in water. One mole of the same complex reacts with two moles of $AgNO_3$ solution to yield two moles of $AgCl_{(s)}$. The structure of the complex is

Homoleptic complexes among the following are:
$(A)$ $K_3[Al(C_2O_4)_3]$
$(B)$ $[CoCl_2(en)_2]^{+}$
$(C)$ $K_2[Zn(OH)_4]$

In the complex $[E(en)_2(C_2O_4)]NO_2$,the oxidation state and coordination number of the element $'E'$ are respectively (where $(en)$ is ethylenediamine):

The primary valence of the metal ion in the coordination compound $K_2[Ni(CN)_4]$ is

$A$ coordination complex contains $Co^{3+}$,$Cl^{-}$,and $NH_3$. When dissolved in water,one mole of this complex gives a total of $3$ moles of ions. The complex is