Question

Which of the following ligand has the highest ligand field strength among the following?

• A. $O{H}^{-}$
• B. $H_{2}O$
• C. $CO$
• D. $N{H}_3$

Answer 1

The correct option is C $CO$

Ligands can be arranged in a series in the order of increasing field strength known as spectrochemical series.
Ligand field strength: $H{O}^{–}<H_{2}O<N{H}_3<CO$