Which of the following sets contains only addition polymers?

Options

A. Polythylene , polypropylene , terylene
B. Polyethlene , PVC, acrilan
C. Buna-S, nylon , polybutadiene
D. Bakelite , PVC, polyethylene

Answer

To determine which of the given sets contains only addition polymers, we need to understand what addition polymers are and analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Addition Polymers**:
- Addition polymers are formed through the addition reaction of monomers with unsaturated bonds (like double bonds).
- In this process, no by-products are formed.

2. **Analyzing Each Option**:
- **Option A**: Polyethylene, Polypropylene, Pterylene
- Polyethylene: Addition polymer
- Polypropylene: Addition polymer
- Pterylene: Condensation polymer
- **Conclusion**: This option is incorrect because it contains a condensation polymer (Pterylene).

- **Option B**: Polyethylene, PVC (Polyvinyl Chloride), Acrylonitrile
- Polyethylene: Addition polymer
- PVC: Addition polymer
- Acrylonitrile: Addition polymer
- **Conclusion**: This option is correct as all listed are addition polymers.

- **Option C**: Buna-S, Nylon, Polybutadiene
- Buna-S: Condensation polymer
- Nylon: Condensation polymer
- Polybutadiene: Addition polymer
- **Conclusion**: This option is incorrect because it contains two condensation polymers (Buna-S and Nylon).

- **Option D**: Bakelite, PVC, Polyethylene
- Bakelite: Condensation polymer
- PVC: Addition polymer
- Polyethylene: Addition polymer
- **Conclusion**: This option is incorrect because it contains a condensation polymer (Bakelite).

3. **Final Conclusion**:
- The only option that contains only addition polymers is **Option B**: Polyethylene, PVC, and Acrylonitrile.

### Final Answer:
The set that contains only addition polymers is **Option B**: Polyethylene, PVC, and Acrylonitrile.