Melamine plastic crockery is a codensation polymer of

Options

A. HCHO and melamine
B. HCHO and ethylene
C. melamine and ethylene
D. None of these

Explanation

### Step-by-Step Solution:

1. **Understanding Condensation Polymers**:
- Condensation polymers are formed through condensation polymerization, which involves the reaction of monomers with the elimination of small molecules, typically water.

2. **Identifying the Monomers**:
- The question asks about melamine plastic crockery, which is a type of condensation polymer. The two main reactants (monomers) involved in the formation of melamine plastic are **melamine** and **formaldehyde**.

3. **Formation of Resin Intermediate**:
- When melamine (which contains amino groups) reacts with formaldehyde, they form a resin intermediate. The reaction involves the formation of bonds between the amine groups of melamine and the aldehyde groups of formaldehyde, resulting in a structure that can further polymerize.

4. **Polymerization Process**:
- During the polymerization process, as the resin intermediates react, small molecules (like water) are eliminated. This leads to the formation of a larger polymer structure.

5. **Final Structure of Melamine Plastic**:
- The final polymer structure consists of a network of interconnected melamine and formaldehyde units, forming a thermosetting polymer. This structure is what gives melamine plastic its durability and makes it suitable for crockery.

6. **Conclusion**:
- Therefore, melamine plastic crockery is a condensation polymer formed from the reaction of **melamine and formaldehyde**.