Which of the following is an addition polymer ?

Options

A. Terylene
B. Bakelite
C. Polyesters
D. Teflon

Answer

To determine which of the following is an addition polymer, we need to understand the characteristics of addition polymers and how they are formed.

### Step-by-Step Solution:

1. **Definition of Addition Polymers**:
Addition polymers are formed from unsaturated monomers, typically containing double or triple bonds. During the polymerization process, these unsaturated bonds open up, allowing the monomers to link together without the loss of any small molecules.

2. **Identifying the Options**:
We need to examine the given options (not specified in the question) to identify which one is an addition polymer. Common examples of addition polymers include polyethylene, polypropylene, and Teflon.

3. **Analyzing Teflon**:
Teflon, also known as polytetrafluoroethylene (PTFE), is formed from the polymerization of tetrafluoroethylene (CF2=CF2). This process involves the opening of the double bonds in tetrafluoroethylene, leading to the formation of the long-chain polymer without the release of any by-products. Therefore, Teflon is an addition polymer.

4. **Analyzing Other Options**:
- **Terylene**: This is a condensation polymer formed from the reaction between ethylene glycol and terephthalic acid, releasing water as a by-product.
- **Bakelite**: This is also a condensation polymer formed from phenol and formaldehyde, again releasing water.
- **Polyesters**: These are formed through the condensation reaction of an alcohol and a carboxylic acid, also releasing water.

5. **Conclusion**:
Among the options, Teflon is the only addition polymer, while the others (Terylene, Bakelite, and Polyesters) are condensation polymers.

### Final Answer:
The addition polymer among the options is **Teflon**.

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