In which of the polymer the monomers used are not correctly given

Options

A. Polyme `rarr` Nylon -6,6, Monomers `rarr` adipic acid, hexamethylene diamine
B. Polymer `rarr` Bakelite , Monomers `rarr` formaldehyde , phenol
C. Polymer `rarr` Buna - N , Monomers `rarr` buta - 1,3 - diene , nitrobenzene
D. Polymer `rarr` Buna - S, Monomers `rarr` buta 1,3- diene , styrene

Answer

To solve the question, we need to identify which polymer has incorrectly listed monomers. We will evaluate each option one by one.

### Step-by-Step Solution:

1. **Evaluate Option 1: Nylon 6,6**
- **Polymer:** Nylon 6,6
- **Monomers:** Adipic acid and hexamethylene diamine
- **Verification:** The monomers used to synthesize Nylon 6,6 are indeed adipic acid (a dicarboxylic acid) and hexamethylene diamine (a diamine).
- **Conclusion:** This option is correct.

2. **Evaluate Option 2: Bakelite**
- **Polymer:** Bakelite
- **Monomers:** Formaldehyde and phenol
- **Verification:** Bakelite is formed from the polymerization of phenol and formaldehyde.
- **Conclusion:** This option is correct.

3. **Evaluate Option 3: Buna N**
- **Polymer:** Buna N
- **Monomers:** Buta-1,3-diene and nitrobenzene
- **Verification:** Buna N is actually made from buta-1,3-diene and acrylonitrile, not nitrobenzene. Therefore, this listing is incorrect.
- **Conclusion:** This option is incorrect.

4. **Evaluate Option 4: Buna S**
- **Polymer:** Buna S
- **Monomers:** Buta-1,3-diene and styrene
- **Verification:** Buna S is correctly formed from buta-1,3-diene and styrene.
- **Conclusion:** This option is correct.

### Final Conclusion:
The polymer with incorrectly listed monomers is **Buna N**, where the monomers should be buta-1,3-diene and acrylonitrile instead of buta-1,3-diene and nitrobenzene. Therefore, the correct answer is **Option 3**.

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