Which of the following ia a condensation polymer?

Options

A. Buna-N
B. Polystyrene
C. Nylon-6
D. Natural rubber

Answer

To determine which of the given options is a condensation polymer, we need to understand what condensation polymers are and analyze each option accordingly.

### Step-by-Step Solution:

1. **Understand Condensation Polymers**:
- Condensation polymers are formed through a step-growth polymerization process where monomers with two or more functional groups react to form a polymer while releasing small molecules, usually water or methanol, as by-products.

2. **Analyze the First Option - Bunyan**:
- Bunyan is made from Buta-1,3-Diene and Acrylonitrile.
- The polymerization process involves breaking double bonds to form a chain.
- Since there are no by-products released during this reaction, Bunyan is classified as an addition polymer.

3. **Analyze the Second Option - Polystyrene**:
- Polystyrene is formed from the polymerization of styrene, which also involves breaking a double bond.
- Similar to Bunyan, this process does not release any by-products.
- Therefore, Polystyrene is also an addition polymer.

4. **Analyze the Third Option - Nylon-6**:
- Nylon-6 is derived from the monomer Caprolactam.
- During the polymerization of Caprolactam, hydrolysis occurs, leading to the formation of Caproic Acid and the release of water as a by-product.
- Since this process involves the release of water, Nylon-6 is classified as a condensation polymer.

5. **Analyze the Fourth Option - Natural Rubber (Polyisoprene)**:
- Polyisoprene is formed through the polymerization of isoprene.
- This process does not involve the release of any by-products.
- Hence, Polyisoprene is also an addition polymer.

### Conclusion:
- Among the given options, **Nylon-6** is the only condensation polymer because it involves the release of water during its formation.

### Final Answer:
**Nylon-6 is a condensation polymer.**

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