Functional Group ID Worksheet - Free Printable

Task: Identify and Name the Functional Groups in the Given Organic Compounds

The goal is to analyze each compound and identify the functional group present. Functional groups are specific atoms or groups of atoms within molecules that determine the chemical properties of the compound. Below, I will go through each compound, identify the functional group, and name it.

---

1.

```
H
|
H-C-C-O-H
| |
H H
|
H
```
- Functional Group: Carboxyl group (–COOH)
- Name: Carboxylic acid

---

2.

```
H
|
H-C-C-N-H
| |
H H
|
H
```
- Functional Group: Amine group (–NH₂)
- Name: Primary amine

---

3.

```
H
|
H-C-O-H
|
H
```
- Functional Group: Carboxyl group (–COOH)
- Name: Carboxylic acid

---

4.

```
H
|
H-C-C-O-H
| |
H H
|
H
```
- Functional Group: Hydroxyl group (–OH)
- Name: Alcohol

---

5.

```
H
C=O
H
```
- Functional Group: Carbonyl group (C=O)
- Name: Ketone

---

6.

```
O
H-C-H
```
- Functional Group: Aldehyde group (–CHO)
- Name: Aldehyde

---

7.

```
O
||
C-C-C-C-C-C
| |
C C
| |
C C
```
- Functional Group: Carbonyl group (C=O) in a ring
- Name: Cyclohexanone (Ketone)

---

8.

```
H
|
H-C-C-S-H
| |
H H
|
H
```
- Functional Group: Thiol group (–SH)
- Name: Thiols or mercaptans

---

9.

```
H
|
H-N-C-O-H
| |
H H
|
H
```
- Functional Group: Carboxyl group (–COOH) and amine group (–NH₂)
- Name: Amide

---

10.

```
H
|
H-C-C-C-S-H
| |
H H
|
H
```
- Functional Group: Sulfhydryl group (–SH)
- Name: Thiols or mercaptans

---

11.

```
H
|
H-C-C-O-H
| |
H H
|
H
```
- Functional Group: Hydroxyl group (–OH)
- Name: Alcohol

---

12.

```
O
||
C-C-C-C
| |
O H
```
- Functional Group: Carboxyl group (–COOH) in a ring
- Name: Lactone (cyclic ester)

---

13.

```
O
||
C-C-C-H
| |
H H
```
- Functional Group: Carbonyl group (C=O) in a ring
- Name: Cyclopentanone (Ketone)

---

14.

```
H
|
H-C-C-N-H
| |
H H
|
H
```
- Functional Group: Amine group (–NH₂)
- Name: Secondary amine

---

15.

```
O-H
|
C-C-C-C-C-C
| |
H H
| |
H H
```
- Functional Group: Hydroxyl group (–OH)
- Name: Alcohol

---

Summary of Functional Groups and Names:

| Compound Number | Functional Group | Name |
|-----------------|--------------------------|---------------------|
| 1 | –COOH | Carboxylic acid |
| 2 | –NH₂ | Primary amine |
| 3 | –COOH | Carboxylic acid |
| 4 | –OH | Alcohol |
| 5 | C=O | Ketone |
| 6 | –CHO | Aldehyde |
| 7 | C=O (in a ring) | Cyclohexanone |
| 8 | –SH | Thiols/mercaptans |
| 9 | –COOH and –NH₂ | Amide |
| 10 | –SH | Thiols/mercaptans |
| 11 | –OH | Alcohol |
| 12 | –COOH (in a ring) | Lactone (cyclic ester) |
| 13 | C=O (in a ring) | Cyclopentanone |
| 14 | –NH₂ | Secondary amine |
| 15 | –OH | Alcohol |

---

Final Answer:

\boxed{
\begin{array}{|c|c|c|}
\hline
\text{Compound Number} & \text{Functional Group} & \text{Name} \\
\hline
1 & -COOH & \text{Carboxylic acid} \\
2 & -NH_2 & \text{Primary amine} \\
3 & -COOH & \text{Carboxylic acid} \\
4 & -OH & \text{Alcohol} \\
5 & C=O & \text{Ketone} \\
6 & -CHO & \text{Aldehyde} \\
7 & C=O \text{ (in a ring)} & \text{Cyclohexanone} \\
8 & -SH & \text{Thiols/mercaptans} \\
9 & -COOH \text{ and } -NH_2 & \text{Amide} \\
10 & -SH & \text{Thiols/mercaptans} \\
11 & -OH & \text{Alcohol} \\
12 & -COOH \text{ (in a ring)} & \text{Lactone (cyclic ester)} \\
13 & C=O \text{ (in a ring)} & \text{Cyclopentanone} \\
14 & -NH_2 & \text{Secondary amine} \\
15 & -OH & \text{Alcohol} \\
\hline
\end{array}
}