Condensation polymers are formed from monomers

Options

A. What have bifunctional groups
B. Which have multiple (C=C)or `(C-=N)` or `(C-=C)` bonds
C. In which elimination can take place
D. In which addition can take place

Answer

**Step-by-Step Solution:**

1. **Understanding Condensation Polymers:**
- Condensation polymers are formed through a polymerization process where monomers join together, resulting in the elimination of small molecules, often water. This distinguishes them from addition polymers, where no small molecules are lost.

2. **Identifying the Monomers:**
- To form a condensation polymer, we need monomers that have at least two functional groups. These functional groups allow the monomers to react with each other and form bonds while releasing a small molecule (like water).

3. **Example of a Condensation Polymer:**
- A well-known example of a condensation polymer is Nylon 6-6. It is formed from two specific monomers:
- **Adipic Acid:** This monomer contains two carboxylic acid (-COOH) groups, making it bifunctional.
- **Hexamethylene Diamine:** This monomer contains two amine (-NH2) groups, also making it bifunctional.

4. **Polymerization Reaction:**
- When adipic acid and hexamethylene diamine react, they undergo a condensation reaction. The carboxylic acid groups of adipic acid react with the amine groups of hexamethylene diamine, leading to the formation of amide bonds and the release of water molecules.

5. **Conclusion:**
- Therefore, condensation polymers are formed from monomers that possess two functional groups. In the case of Nylon 6-6, the two functional groups from each monomer facilitate the formation of the polymer while eliminating water.

**Final Answer:**
Condensation polymers are formed from monomers that have at least two functional groups, allowing them to react and eliminate small molecules like water during the polymerization process.

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