`[Ni(CN)_(4)]^(2-)` has________.shape and it is______.in nature.

SF_(4) has _____shape.

(a) What is a ligand ? Give an example of a bidentate ligand. (b) Explain as to how the two complexes of nickel, [Ni(CN)_(4)]^(2-) and Ni(CO)_(4) have different structures but do not differ in their magnetic behaviour. (Ni = 28)

Give reason for the statement [Ni(CN)_(4)]^(2-) is diamagnetic while [NiCl_(4)]^(2-) is paramagnetic in nature .

Explain the following giving reasons [NiCI_(4)]^(2-) is tetrahedral and paramagnetic whereas [Ni(CN)_(4)]^(2-) is square plannar and dimagnetic.

Deduce the structures of [NiCl_(4)]^(2-) and [Ni (CN)_(4)]^(2-) considering the hybridisation of the metal ion. Calculate the magnetic moment (spin only) of the species.

Deduce the structures of [NiCl_(4)]^(2-) and [Ni (CN)_(4)]^(2-) considering the hybridisation of the metal ion. Calculate the magnetic moment (spin only) of the species.

Draw the structures of [Co(NH_(3))_(6)]^(3+),[Ni(CN)_(4)]^(2-) and [Ni(CO)_(4)] Write the hybridisation of atomic orbitals of the transition metal in each case .

Out of [Fe(CN)_6]^(4-) , [Ni(CN)_4]^(2-) , and [Ni(CO)_4] : select the incorrect Statement(s):

Both [Ni(CO)_4] and [Ni (CN)_4]^(2-) are diamagnetic The hybridisations of nickel in these complexes , respectively are :

Assertion Ni(CO)_(4) is tetrahedral in shape Reason Ni atom is in zero oxidation state and undergoes sp^(3) -hybridisation in Ni(CO)_(4) .