PVC polymer can be prepared by which of the monomers'?

Options

A. `CH_(2)=CH_(2)`
B. `CH_(2)=CH-Cl`
C. `C_(6)H_(5)-CH=CH_(2)`
D. `CH_(3)-CH=CH_(2)`

Answer

To determine which monomer can be used to prepare the PVC polymer, we need to identify the correct monomer structure and understand the polymerization process involved.

### Step-by-Step Solution:

1. **Identify PVC**:
- PVC stands for polyvinyl chloride. It is a polymer made from the monomer vinyl chloride.

2. **Structure of Vinyl Chloride**:
- The chemical structure of vinyl chloride is CH2=CHCl. This indicates that it has a double bond between the two carbon atoms, with one of the carbons attached to a chlorine atom.

3. **Polymerization Process**:
- PVC is formed through the polymerization of vinyl chloride. This process typically involves the addition of many vinyl chloride monomers (CH2=CHCl) to form long chains of polyvinyl chloride (-(CH2-CHCl)n-).

4. **Examine the Options**:
- We need to evaluate the provided options to find which one corresponds to vinyl chloride (CH2=CHCl):
- Option 1: CH2=CH2 (Ethene) - Incorrect
- Option 2: CH2=CHCl (Vinyl Chloride) - Correct
- Option 3: C6H5CH=CH2 (Benzene derivative) - Incorrect
- Option 4: CH3-CH=CH2 (Propene) - Incorrect

5. **Conclusion**:
- The only correct monomer that can be used to prepare PVC is vinyl chloride (CH2=CHCl).

### Final Answer:
PVC polymer can be prepared by the monomer CH2=CHCl (Vinyl Chloride).

---