The monomer of polythene is ___________

Options

A. Ethylene
B. Ethene
C. Ethane
D. Polyene

Explanation

To determine the monomer of polythene, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Polythene**: Understand that polythene is a type of synthetic polymer commonly used in various applications, such as plastic bags and containers.

2. **Define Monomer**: A monomer is a small molecule that can join together with other similar molecules to form a polymer.

3. **Identify the Monomer of Polythene**: The monomer that polymerizes to form polythene is known as ethylene.

4. **Chemical Structure of Ethylene**: Ethylene is represented by the chemical formula C2H4, which can also be written as CH2=CH2. This indicates that ethylene has a double bond between two carbon atoms.

5. **Polymerization Process**: When ethylene undergoes polymerization, the double bond opens up, allowing the ethylene molecules to link together, forming long chains of polythene (C2H4)n.

6. **Final Answer**: Therefore, the monomer of polythene is ethylene.

### Conclusion:
The monomer of polythene is **ethylene**.

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