How many functional groups are present in monomer of polymer nylon-6?

Answer

To determine how many functional groups are present in the monomer of the polymer nylon-6, we need to analyze the structure of its monomer, caprolactam.

### Step-by-Step Solution:

1. **Identify the Monomer**:
- The monomer of nylon-6 is caprolactam, also known as azepan-2-one.

2. **Draw the Structure of Caprolactam**:
- The structure of caprolactam can be represented as follows:
- It has a carbonyl group (C=O) and an amine group (NH).
- The full structure is:
```
O
||
C - NH - CH2 - CH2 - CH2 - CH2 - CH2
```

3. **Identify Functional Groups**:
- In the structure of caprolactam, we can identify the following functional groups:
- **Amide Group**: The presence of the carbonyl (C=O) directly bonded to a nitrogen (NH) indicates the presence of an amide functional group.

4. **Count the Functional Groups**:
- From the analysis, we see that there is **one amide functional group** present in the caprolactam structure.

5. **Conclusion**:
- Therefore, the number of functional groups present in the monomer of nylon-6 (caprolactam) is **one amide group**.

### Final Answer:
There is **one functional group** (amide) present in the monomer of nylon-6.

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