Problem 1
Discuss the main points of Werner theory. What is the significance?
Problem 2
Discuss in brief the crystal field theory and represent the splitting of ' \(d\) ' orbitals in octahedral and tetrahedral fields.
Problem 3
Discuss the salient features of valence bond theory. What are all its applications?
Problem 4
Explain the following: (a) \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is paramagnetic and coloured. (b) \(\left(\mathrm{Ni}(\mathrm{CN})_{4}\right)^{2-}\) is square planar, but \(\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}\) is tetrahedral. (c) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) is more stable than \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\), while \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) is more stable than \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) (d) Octahedral complexes are less stable than the square planar complexes. (e) \(\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}\) is a low-spin complex, but \(\left[\mathrm{CoF}_{6}\right]^{3-}\) is high-spin complex.
Problem 6
How does crystal field theory differ from valence bond theory?
Problem 7
Discuss Sidgwick's concept of effective atomic number with the help of suitable example.
Problem 8
What are the limitations of valence bond theory?
Problem 10
Discuss the crystal field splitting in a square planar complex.
Problem 11
Discuss the factors affecting the magnitude of crystal field splitting.
Problem 12
Discuss the salient features of ligand field theory. How does it differ from crystal field theory?
