The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity. Answer the following questions : (a) On the basis of CFT, explain why $[\text{Ti}(\text{H}_2\text{O})_6]\text{Cl}_3$ complex is coloured ? What happens on heating the complex $[\text{Ti}(\text{H}_2\text{O})_6]\text{Cl}_3$ ? Give reason. [Atomic no. : $\text{Ti} = 22$] (b) (i) What is crystal field splitting energy ? OR (b) (ii) On the basis of $\Delta_0$ and $\text{P}$ (pairing energy), how can you differentiate between a strong field ligand and a weak field ligand ? (c) Why are low spin tetrahedral complexes rarely observed ?