Which of the following is an unsaturated compound ?

Options

A. `C_(6)H_(14)`
B. `C_(4)H_(8)`
C. `C_(3)H_(7)OH`
D. `CH_(3)OH`

Explanation

To determine which of the given compounds is an unsaturated compound, we need to understand the definitions and formulas associated with saturated and unsaturated compounds.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Saturated Compounds**: These compounds contain only single bonds between carbon atoms. They follow the general formula for alkanes, which is \( C_nH_{2n+2} \).
- **Unsaturated Compounds**: These compounds contain at least one double bond (alkenes) or triple bond (alkynes) between carbon atoms. The general formulas for these are:
- Alkenes: \( C_nH_{2n} \)
- Alkynes: \( C_nH_{2n-2} \)

2. **Analyze Each Compound**:
- **Compound 1: \( C_6H_{14} \)**
- Check if it follows the alkane formula: \( C_nH_{2n+2} \)
- For \( n = 6 \): \( H = 2(6) + 2 = 14 \)
- This matches, so \( C_6H_{14} \) is a saturated compound (alkane).

- **Compound 2: \( C_4H_8 \)**
- Check if it follows the alkene formula: \( C_nH_{2n} \)
- For \( n = 4 \): \( H = 2(4) = 8 \)
- This matches, so \( C_4H_8 \) is an unsaturated compound (alkene).

- **Compound 3: \( C_3H_7OH \)**
- This compound has an alcohol functional group (–OH) and can be analyzed as follows:
- Check if it follows the alkane formula: \( C_nH_{2n+2} \)
- For \( n = 3 \): \( H = 2(3) + 2 = 8 \)
- However, it has only 7 hydrogens due to the presence of the –OH group, indicating it is not a saturated hydrocarbon.

- **Compound 4: \( C_1H_4 \)**
- Check if it follows the alkane formula: \( C_nH_{2n+2} \)
- For \( n = 1 \): \( H = 2(1) + 2 = 4 \)
- This matches, so \( C_1H_4 \) is also a saturated compound.

3. **Conclusion**:
- The only unsaturated compound among the options is **\( C_4H_8 \)**.

### Final Answer:
The unsaturated compound is **\( C_4H_8 \)**.