Trans -form of polyisoprene is

Options

A. Guttapercha
B. Hydrochloride rubber
C. Buna -N
D. Synthetic rubber

Explanation

To determine the trans-form of polyisoprene, we need to understand what polyisoprene is and its structural characteristics.

### Step-by-Step Solution:

1. **Understanding Polyisoprene**:
- Polyisoprene is a polymer made from the monomer isoprene. It can exist in two forms: cis and trans. The trans-form is known for its rubber-like properties.

2. **Identifying the Trans-form**:
- The trans-form of polyisoprene is known as Goodtaparcha. This is a synthetic rubber that is derived from the polymerization of isoprene.

3. **Structure of Goodtaparcha**:
- The structure of Goodtaparcha can be represented as a long chain of repeating isoprene units. Each unit has a specific arrangement of double bonds and methyl groups (CH3).

4. **Chemical Representation**:
- The chemical structure of polyisoprene in its trans-form can be depicted as follows:
- The repeating unit has the formula:
\[ \text{(C}_5\text{H}_8\text{)}_n \]
- In the trans configuration, the double bonds in the isoprene units are arranged such that the substituents are on opposite sides, giving it a more linear structure.

5. **Conclusion**:
- Therefore, the trans-form of polyisoprene is identified as Goodtaparcha.

### Final Answer:
The trans-form of polyisoprene is Goodtaparcha.

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