Identify the co-polymer

Options

A. Buna-N
B. Neoprene
C. Natural rubber
D. All of these

Answer

To identify the co-polymer from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Co-polymers**:
- A co-polymer is a polymer that is made from two different types of monomeric units.

2. **Identifying the Monomeric Units**:
- We need to look for the options provided and identify if they consist of two different monomers.

3. **Analyzing the Given Options**:
- **Option A**: Bunion (1,3-butadiene and acrylonitrile)
- **Option B**: Neoprene (made from chloroprene)
- **Option C**: Natural rubber (made from isoprene)
- **Option D**: Not specified in the transcript.

4. **Determining the Composition of Each Option**:
- **Bunion**:
- Composed of 1,3-butadiene (CH2=CH-CH=CH2) and acrylonitrile (CH2=CH-CN).
- Since it consists of two different monomeric units, it qualifies as a co-polymer.
- **Neoprene**:
- Made from chloroprene (CH2=CCl-CH=CH2), which is a homopolymer, not a co-polymer.
- **Natural Rubber**:
- Made from isoprene (CH2=C(CH3)-CH=CH2), which is also a homopolymer.

5. **Conclusion**:
- Based on the analysis, the only option that qualifies as a co-polymer is **Bunion** (Option A), which is formed from the combination of 1,3-butadiene and acrylonitrile.

### Final Answer:
The co-polymer is **Bunion** (Option A).

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