Study.com quiz worksheet on addition polymers, featuring questions about repeating units, monomers, and polymer structures.

Problem Analysis and Solution

The worksheet focuses on understanding polymers, their repeating units (monomers), and how they are formed. Let's solve each question step by step.

---

#### Question 1: What is the repeating unit of this polymer?

The given polymer structure is:

```
Cl
|
Cl - C - Cl
| |
Cl - C - Cl
| |
Cl - C - Cl
```

Each repeating unit in the polymer is a segment that can be isolated and repeated to form the entire polymer chain. In this case, the repeating unit is:

```
Cl
|
Cl - C - Cl
```

This repeating unit is essentially a chlorinated ethylene molecule (`CH_2=CCl_2`).

Correct Answer:
- Option 3: `Cl - CH_2 - CH_2 - Cl`

---

#### Question 2: What is the monomer of this polymer?

The given polymer structure is:

```
Cl
|
Cl - C - Cl
| |
Cl - C - Cl
| |
Cl - C - Cl
```

To determine the monomer, we need to identify the simplest building block that can undergo polymerization to form this polymer. The repeating unit identified in Question 1 is `Cl - CH_2 - CH_2 - Cl`, which suggests that the monomer must be able to form this repeating unit through addition polymerization.

The monomer for this polymer is vinyl chloride (`CH_2=CHCl`), which is a common monomer used to produce polyvinyl chloride (PVC).

Correct Answer:
- Option 2: `CH_2=CHCl`

---

#### Question 3: What polymer would be made from this monomer?

The given monomer is:

```
O
C = C - C
```

This monomer is acrylic acid (`CH_2=CHCOOH`). When acrylic acid undergoes polymerization, it forms polyacrylic acid. The polymer structure will have repeating units of the monomer, with the carboxylic acid group (`-COOH`) remaining intact.

The polymer structure will look like:

```
O
[- CH_2 - CH - COO -]_n
```

Among the given options, the correct polymer structure is:

```
O
[- CH_2 - CH - COO -]_n
```

Correct Answer:
- Option 4:

---

Final Answers:

1. Repeating unit of the polymer:
Option 3: `Cl - CH_2 - CH_2 - Cl`

2. Monomer of the polymer:
Option 2: `CH_2=CHCl`

3. Polymer from the given monomer:
Option 4:

Boxed Final Answers:

\[
\boxed{3, 2, 4}
\]