Question:medium
Identify a ligand with highest field strength among the following.
Identify a ligand with highest field strength among the following.
Show Hint
Use the spectrochemical series.
Updated On: Oct 1, 2026
- \(\text{H}_2\text{O}\)
- \(\text{NH}_3\)
- \(\text{S}^{2-}\)
- \(\text{NCS}^-\)
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Place each in the series:
$\text{S}^{2-}$ is weak. $\text{H}_2\text{O}$ lies in the middle. $\text{NCS}^-$ (bonded through N) is a little stronger than water. $\text{NH}_3$ is stronger again.
Step 2: Pick:
$\text{NH}_3$ comes latest in the series among the four, so it produces the largest splitting.
Final Answer:
The strongest field ligand is $\text{NH}_3$, option (B). \[ \boxed{\text{NH}_3} \]
$\text{S}^{2-}$ is weak. $\text{H}_2\text{O}$ lies in the middle. $\text{NCS}^-$ (bonded through N) is a little stronger than water. $\text{NH}_3$ is stronger again.
Step 2: Pick:
$\text{NH}_3$ comes latest in the series among the four, so it produces the largest splitting.
Final Answer:
The strongest field ligand is $\text{NH}_3$, option (B). \[ \boxed{\text{NH}_3} \]
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