Which of the following statement is not correct

Options

A. Caprolactam is the monomer of nylon-6
B. Terylene is the monomer of nylon-6
C. Phenol formaldehyde resin is known as bakelite
D. The monomer of natural rubber is butadiene

Answer

To determine which of the statements is not correct, let's analyze each statement one by one:

1. **Statement 1**: Caprolactam is the monomer of nylon 6.
- This statement is **correct**. Caprolactam is indeed the monomer used to synthesize nylon 6 through a process called ring-opening polymerization.

2. **Statement 2**: Pterylene is the monomer of nylon 6.
- This statement is **not correct**. Pterylene is not a monomer of nylon 6; instead, it is a type of polymer. The correct monomer for nylon 6 is caprolactam.

3. **Statement 3**: Phenylformaldehyde resin is non-bacrylate.
- This statement is **correct**. Phenylformaldehyde resin is indeed a non-bacrylate polymer. It is formed from the polymerization of phenol and formaldehyde.

4. **Statement 4**: The monomer of natural rubber is butadiene.
- This statement is **not correct**. The monomer of natural rubber is actually 2-methyl-1,3-butadiene, also known as isoprene, not just butadiene.

Now, summarizing the analysis:
- Statement 1 is correct.
- Statement 2 is not correct.
- Statement 3 is correct.
- Statement 4 is not correct.

Thus, the statements that are not correct are **Statement 2** and **Statement 4**. However, since the question asks for which statement is not correct, we can conclude that **Statement 2** is the primary incorrect statement regarding nylon 6.

### Final Conclusion:
The statement that is not correct is: **Pterylene is the monomer of nylon 6.**

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