Which of the following is an example of condensation polymer (or) Which of the following is not an example of addition polymer

Options

A. Polyethene
B. PVC
C. Orlon
D. Terylene

Answer

To determine which of the options is an example of a condensation polymer or which is not an example of an addition polymer, we can follow these steps:

### Step 1: Understand the Types of Polymers
- **Addition Polymers**: Formed by the addition of monomers with unsaturated bonds (like double bonds) without the loss of any small molecules.
- **Condensation Polymers**: Formed by the reaction of monomers with the elimination of small molecules (like water, methanol, etc.).

### Step 2: Analyze the Given Options
1. **Polythene**:
- Structure: (CH2=CH2)n
- Type: Addition polymer (formed by the polymerization of ethylene).

2. **PVC (Polyvinyl Chloride)**:
- Structure: (CH2=CHCl)n
- Type: Addition polymer (formed by the polymerization of vinyl chloride).

3. **Olon** (assuming it refers to a type of polymer):
- Structure: (CH2=CH)n (similar to addition polymers).
- Type: Addition polymer.

4. **Pterylene**:
- Structure: Contains ester or amide linkages, typically formed by the reaction of dicarboxylic acids and diamines.
- Type: Condensation polymer (formed by the elimination of small molecules).

### Step 3: Identify the Correct Answer
- From the analysis:
- **Polythene, PVC, and Olon** are all addition polymers.
- **Pterylene** is a condensation polymer.

Thus, the correct answer to the question is **Pterylene**, as it is an example of a condensation polymer and is not an addition polymer.

### Summary of the Solution
- **Polythene**: Addition polymer
- **PVC**: Addition polymer
- **Olon**: Addition polymer
- **Pterylene**: Condensation polymer

### Final Answer
**Pterylene is an example of a condensation polymer and is not an example of an addition polymer.**

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