The monomer of terylene are .............and ...................

Answer

To answer the question regarding the monomers of terylene, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Polymer**: The question asks for the monomers of terylene. Terylene is a type of polyester.

2. **Know the Monomers**: Terylene is synthesized from two specific monomers. The first monomer is **terephthalic acid**, and the second monomer is **ethylene glycol**.

3. **Structure of Terephthalic Acid**: Terephthalic acid has the following structure:
- It consists of a benzene ring with two carboxylic acid groups (-COOH) attached to it at the 1,4-positions (para position).
- The chemical formula is C8H6O4.

4. **Structure of Ethylene Glycol**: Ethylene glycol has the following structure:
- It consists of two hydroxyl groups (-OH) attached to a two-carbon chain.
- The chemical formula is C2H6O2.

5. **Polymer Formation**: When terephthalic acid and ethylene glycol react, they undergo a condensation reaction, where a water molecule is eliminated, leading to the formation of terylene (polyethylene terephthalate).

6. **Final Answer**: Therefore, the monomers of terylene are **terephthalic acid** and **ethylene glycol**.

### Summary:
The monomers of terylene are terephthalic acid and ethylene glycol.

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