Synthetic polymers are

Options

A. Bakellite
B. Polyvinyl chloride
C. polystyrene
D. Natural rubber

Explanation

To determine which of the given options are synthetic polymers, we need to analyze each option based on their definitions and characteristics.

### Step-by-Step Solution:

1. **Understanding Synthetic Polymers**:
- Synthetic polymers are man-made polymers created through chemical processes. They are not found in nature and are synthesized from monomers.

2. **Analyzing Option A: Bakelite**:
- Bakelite is made from phenol and formaldehyde.
- It is used for insulating materials and is produced through a condensation reaction.
- **Conclusion**: Bakelite is a synthetic polymer.

3. **Analyzing Option B: Polyvinyl Chloride (PVC)**:
- PVC is made from the polymerization of vinyl chloride monomers.
- It is widely used in construction and plumbing.
- **Conclusion**: PVC is a synthetic polymer.

4. **Analyzing Option C: Polystyrene**:
- Polystyrene is made from the polymerization of styrene monomers.
- It is commonly used in packaging and insulation materials.
- **Conclusion**: Polystyrene is a synthetic polymer.

5. **Analyzing Option D: Natural Rubber**:
- Natural rubber is derived from the latex of rubber trees and consists mainly of polyisoprene.
- Since it is obtained from natural sources, it is not a synthetic polymer.
- **Conclusion**: Natural rubber is not a synthetic polymer.

### Final Answer:
The synthetic polymers among the options are:
- A: Bakelite
- B: Polyvinyl Chloride (PVC)
- C: Polystyrene

Thus, the correct options that are synthetic polymers are **A, B, and C**.

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