Why is `K_4[Fe(CN)_6]` not toxic whereas KCN is highly toxic ?

K_4[Fe(CN)_6] is a

The freezing point of a solution containing 0.1g of K_3[Fe(CN)_6] in 100 g of water. (K_f=1.86 K kg mol^-1) is

Explain, Why [Ni(CO)_4] is diamagnetic whereas [NiCl_4]^(2-) is paramagnetic ?

Conductivity of a saturated solution of CO_2[Fe(CN)_6] is 2.06xx10^-6ohm^-1 cm^-1 and that of wter used is 4.0xx10^-7 ohm^-1cm^-1 . Calculate the solubility and solubility product of CO_2[Fe(CN)_6] in water at 25^@C . [Ionic molar conductivities: CO^(2+)=86.0,[Fe(CN)_6]^-4=444.0 ohm^-1 cm^2 mol^-1] .

[Fe(H_2O)_6]^(3+) is strongly paramagnetic whereas [Fe(CN)_6]^3- is weakly paramagnetic. Explain.

Name the following coordination entities and describe their structures : [Fe(CN)_6]^(4-) (Atomic numbers : Fe = 26, Cr = 24, Ni = 28)

For the complex K_3[Fe(CN)_5NO] identify the cental atom and ligands.

If M_("normal") is the normal molecular mass and alpha is the degree of ionization of K_(3)[Fe(CN)_(6)] , then the abnormal molecular mass of the complex in the solution will be :

For the complex K_4[Ni(CN)_4 ] identify the ligands & central atom.

[Fe(H_2O)_6]^(3+) is strongly paramagnetic whereas [Fe(CN)_6]^(3-) is weakly paramagnetic. Explain.