Answer
The ligands that cause large splitting of the d orbitals \[\left( i.e.,\text{ }large\text{ }{{\Delta }_{o}} \right)\] are called strong field ligands, and the ligands that lead to small \[~{{\Delta }_{o}}\] are called weak field ligands.
Work Step by Step
The ligands that cause large splitting of the d orbitals \[\left( i.e.,\text{ }large\text{ }{{\Delta }_{o}} \right)\] are called strong field ligands, and the ligands that lead to small \[~{{\Delta }_{o}}\] are called weak field ligands.
