Polystyrene is a

Options

A. Copolymer
B. Addition polymer
C. Condensation polymer
D. None

Answer

**Step-by-Step Solution:**

1. **Understanding Polystyrene**:
- Polystyrene is a type of polymer, which is a large molecule made up of repeating structural units called monomers. The monomer that makes up polystyrene is styrene.

2. **Identifying the Type of Polymer**:
- Polymers can be classified into different categories based on how they are formed. The main types include:
- **Copolymers**: Formed from two or more different types of monomers.
- **Addition Polymers**: Formed by the addition of monomers without the loss of any small molecules.
- **Condensation Polymers**: Formed by linking monomers with the elimination of small molecules (like water).

3. **Analyzing the Monomer of Polystyrene**:
- Since polystyrene is formed from only one type of monomer, styrene, it is classified as a homopolymer.

4. **Polymerization Process**:
- During the polymerization of styrene, the double bond in the styrene monomer breaks, allowing the monomers to link together to form long chains of polystyrene. This process does not eliminate any small molecules.

5. **Conclusion**:
- Since polystyrene is formed from the addition of styrene monomers without the loss of any small molecules, it is classified as an **addition polymer**.

6. **Final Answer**:
- Therefore, the correct answer to the question "Polystyrene is a" is **adhesion polymer** (which is another term for addition polymer).

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