(i) What type of isomerism is shown by the complex `[Cr(H_(2)O)_(6)]Cl_(3)`?
(ii) On the basis of crystal field theory, write the electronic configuration for `d^(4)` ion if `Delta_(0)gtP.`
(iii) Write the hybridization and shape of `[CoF_(6)]^(3-)`. (Atomic number of Co=27)

Explanation

Let's break down the solution to the question step by step.

### (i) What type of isomerism is shown by the complex `[Cr(H₂O)₆]Cl₃`?

1. **Identify the complex**: The complex is `[Cr(H₂O)₆]Cl₃`.
2. **Determine the ligands**: The complex contains water (H₂O) as a ligand and chloride ions (Cl⁻) as counter ions.
3. **Isomerism type**: Since the complex has both water and chloride ions, it can exhibit solvate isomerism (also known as hydration isomerism). This occurs when the ligands can be arranged in different ways around the central metal ion.
4. **Example of isomers**: One possible isomer could have all six water molecules coordinated to chromium, while another could have three water molecules and three chloride ions coordinated.
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