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 compounds is a secondary alcohol, we need to analyze the structures of each compound provided in the question. A secondary alcohol is defined as an alcohol where the hydroxyl (-OH) group is attached to a carbon atom that is bonded to two other carbon atoms.

### Step-by-Step Solution:

1. **Identify the Compounds**: The question provides four compounds: isobutyl alcohol, isopropyl alcohol, isopentyl alcohol, and mupentyl alcohol.

2. **Draw the Structures**:
- **Isobutyl Alcohol**: CH3-CH(CH3)-CH2-CH2OH
- The carbon with the -OH group is attached to one carbon (CH2) and two other carbons (CH3 and CH2), making it a primary alcohol.
- **Isopropyl Alcohol**: CH3-CHOH-CH3
- The carbon with the -OH group is attached to two methyl groups (CH3) and one hydrogen, making it a secondary alcohol.
- **Isopentyl Alcohol**: CH3-CH(CH2OH)-CH2-CH3
- The carbon with the -OH group is attached to one carbon (CH2) and two other carbons (CH3 and CH2), making it a primary alcohol.
- **Mupentyl Alcohol**: CH3-CH(CH3)-CH2-CH2OH
- The carbon with the -OH group is attached to one carbon (CH2) and two other carbons (CH3 and CH2), making it a primary alcohol.

3. **Determine the Type of Alcohol**:
- **Isobutyl Alcohol**: Primary
- **Isopropyl Alcohol**: Secondary
- **Isopentyl Alcohol**: Primary
- **Mupentyl Alcohol**: Primary

4. **Conclusion**: The only secondary alcohol among the given options is **isopropyl alcohol**.

### Final Answer:
The secondary alcohol among the following is **isopropyl alcohol**.