Which of the following represent the example of a homopolymer?

Options

A. `PMMA`
B. Bakelite
C. Glyptal
D. `PTFE`

Answer

To determine which of the options represent an example of a homopolymer, we first need to understand what a homopolymer is.

### Step-by-Step Solution:

1. **Definition of Homopolymer**:
- A homopolymer is a type of polymer that is formed by the polymerization of a single type of monomer. This means that all the repeating units in the polymer chain are identical.

2. **Identifying the Options**:
- We need to analyze the given options to see which ones are made from only one type of monomer.
- The options provided are:
- Option 1: PMMA (Polymethyl methacrylate)
- Option 2: Bakelite
- Option 3: Glyptol
- Option 4: PTFE (Polytetrafluoroethene)

3. **Analyzing Each Option**:
- **Option 1: PMMA (Polymethyl methacrylate)**:
- PMMA is produced from the polymerization of methyl methacrylate, which is a single type of monomer. Therefore, PMMA is a homopolymer.
- **Option 2: Bakelite**:
- Bakelite is made from phenol and formaldehyde, which are two different types of monomers. Thus, Bakelite is a copolymer, not a homopolymer.
- **Option 3: Glyptol**:
- Glyptol is made from phthalic acid and glycerol, which are also two different types of monomers. Therefore, Glyptol is not a homopolymer.
- **Option 4: PTFE (Polytetrafluoroethene)**:
- PTFE is made from the polymerization of tetrafluoroethene, which is a single type of monomer. Thus, PTFE is a homopolymer.

4. **Conclusion**:
- From the analysis, we find that both PMMA and PTFE are examples of homopolymers.
- Therefore, the correct answer includes options 1 (PMMA) and 4 (PTFE).

### Final Answer:
The examples of homopolymers from the given options are:
- Option 1: PMMA (Polymethyl methacrylate)
- Option 4: PTFE (Polytetrafluoroethene)