Polyethylene is

Options

A. Random copolymer
B. Homopolymer
C. Alternate copolymer
D. Crosslinked copolymer

Explanation

**Step-by-Step Solution:**

1. **Understanding Polyethylene**: Polyethylene, commonly referred to as polythene, is a type of polymer made from the polymerization of ethylene monomers. The chemical structure of ethylene is represented as CH2=CH2.

2. **Polymerization Process**: When many ethylene monomers (CH2=CH2) undergo polymerization, they link together to form a long chain. This process can be represented as:
\[ n \, \text{(CH}_2\text{=CH}_2\text{)} \rightarrow \text{(CH}_2\text{-CH}_2\text{)}_n \]
Here, 'n' indicates that there are many repeating units of the ethylene monomer.

3. **Classification of Polyethylene**: Polyethylene is classified as a homopolymer because it is formed from only one type of monomer (ethylene). In contrast, a copolymer is formed from two or more different types of monomers.

4. **Types of Copolymers**:
- **Random Copolymer**: This type is formed when two different monomers are linked together in a random order.
- **Alternating Copolymer**: In this type, two different monomers alternate in the polymer chain.
- **Cross-linked Copolymer**: This involves covalent bonds between different polymer chains, creating a network structure.

5. **Conclusion**: Since polyethylene is made from only ethylene monomers, it is classified as a homopolymer. Therefore, the correct answer to the question "Polyethylene is" is that it is a homopolymer.

**Final Answer**: Polyethylene is a homopolymer.

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