Choose the secondary alcohol among the following

Options

A. Isobutyl alcohol
B. Isopropyl alcohol
C. Isopentyl alcohol
D. Neopentyl alcohol

Answer

To determine which of the given alcohols is a secondary alcohol, we need to analyze the structure of each alcohol and identify the carbon atom to which the hydroxyl (OH) group is attached. A secondary alcohol is characterized by having the OH group attached to a carbon atom that is bonded to two other carbon atoms.

### Step-by-Step Solution:

1. **Identify the Structures**:
- **Isobutyl alcohol**: This has a structure where the OH group is attached to a carbon that is bonded to one other carbon (1° carbon).
- **Isopropyl alcohol**: This has a structure where the OH group is attached to a carbon that is bonded to two other carbon atoms (2° carbon).
- **Isopentyl alcohol**: This has a structure where the OH group is attached to a carbon that is bonded to one other carbon (1° carbon).
- **Neopentyl alcohol**: This has a structure where the OH group is attached to a carbon that is bonded to two other carbon atoms (2° carbon).

2. **Analyze Each Alcohol**:
- **Isobutyl alcohol**: The carbon with the OH is a primary carbon (1°).
- **Isopropyl alcohol**: The carbon with the OH is a secondary carbon (2°).
- **Isopentyl alcohol**: The carbon with the OH is a primary carbon (1°).
- **Neopentyl alcohol**: The carbon with the OH is a primary carbon (1°).

3. **Determine the Secondary Alcohol**:
- From the analysis, we see that isopropyl alcohol is the only alcohol where the OH group is attached to a secondary carbon.

### Conclusion:
The secondary alcohol among the options provided is **Isopropyl alcohol**.