The difference of energy between two sets of d-orbitals obtained due to splitting in a crystal field is called …… .

Explanation

To answer the question about the difference of energy between two sets of d-orbitals due to splitting in a crystal field, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding d-Orbital Splitting**:
In coordination chemistry, when transition metal ions are surrounded by ligands, the degeneracy of the d-orbitals is lifted, leading to a splitting of these orbitals into different energy levels. This is due to the electrostatic interactions between the d-electrons and the electric fields created by the surrounding ligands.

2. **Identifying the Splitting Pattern**:
...