(i) What type of isomerism is shown by complex `[Co(en)_(3)]Cl_(3)`?
(ii) Write the hybridisation and magnetic character of `[Co(C_(2)O_(4))_(3)]^(3-)`. (At.no. of Co = 27)
(iii) Write IUPAC name of the following Complex `[Cr(NH_(3))_(3) Cl_(3)]`

Explanation

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

### (i) What type of isomerism is shown by complex `[Co(en)_(3)]Cl_(3)`?

1. **Identify the complex**: The given complex is `[Co(en)_(3)]Cl_(3)`, where `en` stands for ethylenediamine, a bidentate ligand.

2. **Determine the coordination number**: Cobalt in this complex is coordinated to three ethylenediamine ligands, which gives it a coordination number of 6.

...