A ligand is termed as monodentate, didentate etc, depending upon the__________ present in it .

Answer

To solve the question "A ligand is termed as monodentate, didentate etc., depending upon the__________ present in it," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ligands**:
- Ligands are molecules or ions that can donate a pair of electrons to a central metal atom to form a coordination complex.

2. **Defining Monodentate and Didentate Ligands**:
- A **monodentate ligand** has only one site that can donate a pair of electrons (one lone pair).
- A **didentate ligand** has two sites that can donate pairs of electrons (two lone pairs).

3. **Identifying the Key Factor**:
- The classification of ligands as monodentate, didentate, etc., is based on the number of **lone pair donating sites** present in the ligand.

4. **Example of a Monodentate Ligand**:
- An example of a monodentate ligand is **NH3 (ammonia)**. It has one nitrogen atom with one lone pair that can be donated to the metal ion.

5. **Conclusion**:
- Therefore, the answer to the question is that a ligand is termed as monodentate, didentate, etc., depending upon the **number of lone pair donating sites** present in it.

### Final Answer:
A ligand is termed as monodentate, didentate etc., depending upon the **number of lone pair donating sites** present in it.