Terylene is

Options

A. An addition polymer with a benzene ring in every repeating unit
B. A condensation polymer with benzene ring in every repeating unit
C. An addition polymer with two carbon atoms in every repeating unit
D. A condensation polymer with two nitrogen atoms in every repeating unit

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about Terylene, specifically its classification as a polymer and the characteristics of its repeating units.

2. **Identifying Types of Polymers**:
- **Addition Polymers**: These are formed by the addition of monomer molecules that contain double or triple bonds. No small molecules are released during the process.
- **Condensation Polymers**: These are formed by the condensation reaction between two different bifunctional or trifunctional monomeric units, resulting in the release of small molecules like water.

3. **Analyzing Terylene**:
- Terylene is formed from the condensation reaction between two monomers: ethylene glycol and terephthalic acid.
- Both of these monomers have functional groups that allow them to react and form the polymer.

4. **Determining the Structure**:
- The repeating unit of Terylene contains a benzene ring, which is a characteristic feature of this polymer.
- The structure does not contain nitrogen atoms, which eliminates options that suggest the presence of nitrogen.

5. **Evaluating the Options**:
- **Option 1**: Addition polymer with a benzene ring - Incorrect, as Terylene is a condensation polymer.
- **Option 2**: Condensation polymer with a benzene ring - Correct, as Terylene is formed through condensation and contains benzene rings.
- **Option 3**: Addition polymer with two carbon atoms - Incorrect, as it does not describe Terylene.
- **Option 4**: Condensation polymer with two nitrogen atoms - Incorrect, as Terylene does not contain nitrogen.

6. **Conclusion**: The correct answer is that Terylene is a condensation polymer with a benzene ring in every repeating unit.

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