The example of a homopolymer is

Options

A. Bakellite
B. Nylon-6,6
C. Buna S
D. Neoprene

Explanation

To determine which of the given options is an example of a homopolymer, we first need to understand what a homopolymer is. A homopolymer is a type of polymer that is made up of only one type of monomeric unit.

Let's analyze each option step by step:

### Step 1: Understand the Definition of Homopolymer
- A homopolymer consists of repeating units of a single type of monomer.
- In contrast, copolymers are made from two or more different types of monomers.

### Step 2: Analyze Each Option
1. **Bachylite**:
- Bachylite is formed from phenol and formaldehyde.
- It is a cross-linked polymer and does not consist of just one type of monomer.
- **Conclusion**: Not a homopolymer.

2. **Nylon 66**:
- Nylon 66 is synthesized from hexamethylene diamine and adipic acid.
- It involves two different monomeric units.
- **Conclusion**: Not a homopolymer.

3. **Buna S**:
- Buna S is made from 1,3-butadiene and styrene.
- It is a copolymer because it consists of two different monomers.
- **Conclusion**: Not a homopolymer.

4. **Neoprene**:
- Neoprene is made from chloroprene.
- It consists of repeating units of a single type of monomer (chloroprene).
- **Conclusion**: This is a homopolymer.

### Final Answer:
Based on the analysis, the correct answer is **Neoprene**, which is a homopolymer.