Buna-N is a polymer of

Options

A. Butadiene and Acrylonitrile
B. Butadiene and sodium acetanilide
C. Butadiene and styrene
D. Butadiene and vinyl cyanide

Answer

To determine the monomeric units that form the polymer Buna-N, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Polymer**: The polymer in question is Buna-N.

2. **Understand Copolymerization**: Buna-N is formed through a process called copolymerization, which involves two different monomers combining to form a polymer.

3. **Identify the Monomers**: The two monomers that are used to create Buna-N are:
- 1,3-butadiene
- Acrylonitrile

4. **Structure of Monomers**:
- **1,3-butadiene** has the structure:
\[ \text{CH}_2=CH-CH=CH_2 \]
- **Acrylonitrile** has the structure:
\[ \text{CH}_2=CH-CN \]

5. **Polymer Formation**: When 1,3-butadiene and acrylonitrile undergo copolymerization, they form the polymer Buna-N.

6. **Conclusion**: Based on the above information, we can conclude that Buna-N is a polymer of butadiene and acrylonitrile.

### Final Answer:
Buna-N is a polymer of **butadiene and acrylonitrile**.

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