Functional group identification and organic compound drawing worksheet with handwritten answers.

The image you've uploaded is a Functional Group Identification Worksheet with answers already filled in. Let's go through each part and verify the solutions, then provide a clear explanation for each answer.

---

Part 1: Identify the Functional Groups

#### a.
```
H
|
H - C - C=O
| |
H OH
```

- Structure: This molecule has a carbonyl group (C=O) bonded directly to a hydroxyl group (-OH).
- Functional Group: Carboxylic acid
- ✔ Correct Answer: "carb. acid" (short for carboxylic acid)

> 🔍 Explanation: The general structure is R–COOH. The presence of both the carbonyl (C=O) and hydroxyl (–OH) on the same carbon defines a carboxylic acid.

---

#### b.
```
H O H H
| || | |
H - C - C - O - C - C - H
| | | |
H H H H
```

- Structure: A carbonyl (C=O) attached to an oxygen that connects to another carbon chain.
- Functional Group: Ester
- ✔ Correct Answer: "ester"

> 🔍 Explanation: General form is R–COO–R'. The –COO– linkage between two alkyl groups indicates an ester.

---

#### c.
```
H O H
| || |
H - C - C - N - C - H
| | | |
H H H H
|
H
```

- Structure: A carbonyl (C=O) bonded to a nitrogen atom (N), which is also bonded to two hydrogens and a carbon.
- Functional Group: Amide
- ✔ Correct Answer: "amide (HL)" — likely "HL" stands for "hydrogen and lone pair" or is a typo/abbreviation; the correct term is amide.

> 🔍 Explanation: The functional group is –CONH₂, where a nitrogen is attached to a carbonyl carbon. This is an amide. If it were –CONH–, it would be a secondary amide, but here it appears to be a primary amide (attached to two H atoms).

---

#### d.
```
H OH H H
| | | |
H - C - C - C - C - H
| | | |
H H H H
```

- Structure: An –OH group attached to a carbon in a hydrocarbon chain.
- Functional Group: Alcohol
- ✔ Correct Answer: "alcohol"

> 🔍 Explanation: Any compound with a hydroxyl (–OH) group attached to a saturated carbon is an alcohol. This is butan-2-ol.

---

#### e.
```
H H Br H
| | | |
H - C - C - C - C - H
| | | |
H H H H
```

- Structure: A bromine (Br) atom attached to a carbon in an alkane chain.
- Functional Group: Alkyl halide
- ✔ Correct Answer: "alkyl halide"

> 🔍 Explanation: When a halogen (F, Cl, Br, I) is bonded to an alkyl carbon, it’s called an alkyl halide. Here, bromine is bonded to the third carbon → 3-bromobutane.

---

Part 2: Draw the Following Organic Compounds & State Their Family

#### a) Propanol
- Answer: CH₃–CH₂–CH₂–OH
- Family: Alcohol ✔

> 🔍 Explanation: Propanol has three carbons with an –OH at the end. It's a straight-chain alcohol. Also known as 1-propanol.

---

#### b) 2-butanol
- Answer:
```
OH
|
CH₃–CH–CH₂–CH₃
```
- Family: Alcohol ✔

> 🔍 Explanation: Butane chain (4 carbons), –OH on carbon #2. So it's a secondary alcohol.

---

#### c) Propyne
- Answer: H–C≡C–CH₃
- Family: Alkyne ✔

> 🔍 Explanation: Propyne has three carbons with a triple bond between C1 and C2. Alkynes have C≡C bonds.

---

#### d) Octane
- Answer: A zigzag line with 8 carbons (or written as CH₃(CH₂)₆CH₃)
- Family: Alkane ✔

> 🔍 Explanation: Octane is a straight-chain hydrocarbon with 8 carbons and only single bonds → alkane.

---

#### e) 2-butene
- Answer: CH₃–CH=CH–CH₃
- Family: Alkene ✔

> 🔍 Explanation: Butene means 4 carbons, double bond at position 2 → C=C between C2 and C3. Alkenes contain carbon-carbon double bonds.

---

✔ Summary of Correctness:

| Question | Answer Given | Correct? | Notes |
|--------|--------------|---------|-------|
| 1a | Carboxylic acid | ✔ | Correct |
| 1b | Ester | ✔ | Correct |
| 1c | Amide | ✔ | Correct; "HL" may be unclear, but meaning is clear |
| 1d | Alcohol | ✔ | Correct |
| 1e | Alkyl halide | ✔ | Correct |
| 2a | CH₃CH₂CH₂OH, alcohol | ✔ | Correct |
| 2b | CH₃CH(OH)CH₂CH₃, alcohol | ✔ | Correct |
| 2c | HC≡CCH₃, alkyne | ✔ | Correct |
| 2d | Octane (zigzag), alkane | ✔ | Correct |
| 2e | CH₃CH=CHCH₃, alkene | ✔ | Correct |

---

📌 Final Verdict:

✔ All answers are correct! The student has accurately identified functional groups and drawn the structures properly.

Let me know if you'd like this worksheet converted into a printable format or need help explaining any concept further!