Formaldehyde is one of the monomers of …………………… and……………………

Explanation

**Step-by-Step Solution:**

1. **Identify the Chemical Structure of Formaldehyde:**
- Formaldehyde is represented by the chemical formula HCHO. It consists of a carbon atom double-bonded to an oxygen atom and single-bonded to a hydrogen atom and another hydrogen atom.

2. **Understand the Role of Formaldehyde in Polymerization:**
- Formaldehyde acts as a monomer, which means it is a small molecule that can join together with other monomers to form a polymer.

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