`[NH-(CH_(2))_(6)-NH-CO-(CH_(2))_(4)-CO]_(n)`- is a

Options

A. Homo polymer
B. Co-polymer & Nylon - 6,6
C. Addition polymer
D. Thermosetting polymer

Answer

To determine the type of polymer represented by the formula `[NH-(CH₂)₆-NH-CO-(CH₂)₄-CO]ₙ`, we can follow these steps:

### Step 1: Identify the Structure of the Polymer
The given formula can be broken down into its components:
- The `NH` groups indicate the presence of amine functional groups.
- The `CO` groups indicate the presence of carbonyl (amide) functional groups.
- The `(CH₂)₆` and `(CH₂)₄` segments suggest that there are long hydrocarbon chains in the structure.

### Step 2: Determine the Monomers Involved
From the structure, we can identify that the polymer is formed from two different monomers:
1. **Hexamethylene diamine** (with the formula `NH₂-(CH₂)₆-NH₂`)
2. **Adipic acid** (with the formula `HOOC-(CH₂)₄-COOH`)

These two monomers react to form the polymer through a condensation reaction, where water is eliminated.

### Step 3: Classify the Polymer
Now, we need to classify the polymer based on the following criteria:
- **Homopolymer vs. Copolymer**: A homopolymer consists of only one type of monomer, while a copolymer consists of two or more different types of monomers. Since our polymer is made from hexamethylene diamine and adipic acid, it is a copolymer.

- **Addition Polymer vs. Condensation Polymer**: Addition polymers are formed by the simple addition of monomers without the loss of any small molecules, while condensation polymers are formed by the reaction of monomers with the elimination of small molecules (like water). Since our polymer is formed by the reaction of two different monomers with the elimination of water, it is a condensation polymer.

- **Thermosetting vs. Thermoplastic**: Thermosetting polymers are cross-linked and cannot be remolded, while thermoplastics can be melted and reshaped. Nylon 6,6 (the polymer in question) is a thermoplastic, but the question primarily focuses on the type of polymer rather than its thermal properties.

### Conclusion
Based on the analysis, the polymer represented by the formula `[NH-(CH₂)₆-NH-CO-(CH₂)₄-CO]ₙ` is a **copolymer** formed from hexamethylene diamine and adipic acid, and it is a **condensation polymer**.

### Final Answer
The polymer is a **copolymer**.

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