Describe the structure and magnetic behaviour of `[Ni(CN)_4]^(2-)` ion on the basis of valence bond theory.

(a) Define a ligand . (b) Discuss the magnetic behaviour , nature and geometry of (NiCl_(4))^(2-) ion on the basis of valence bond theory (VBT)

Discuss the nature of bonding and magnetic behaviour in the [Fe(CN)_(6)]^(4-) Co-ordination entities on the basis of valence bond theory.

Discuss the nature of bonding and magnetic behaviour in the [CoF_(6)]^(3-) Co-ordination entities on the basis of valence bond theory.

Discuss the nature of bonding and magnetic behaviour in the [FeF_(6)]^(3-) Co-ordination entities on the basis of valence bond theory.

Describe the formation of H_2 O molecule on the basis of valence bond theory.

Describe the limitations of valence bond theory.

Give an account of the valence bond theory . Explain the geometry and magnetic behaviour of the complex ion [Fe(CN)_(6)]^(4-) on the basis of the theory .

State the hybridization and magnetic property of [Fe(CN)_6]^(3-) ion according to the valence bond theory.

Explain the geometry and magnetic character of hexafluorocobaltate(III) ion on the basis of valence bond theory.