Alcohol: Any organic compound whose molecule contains one or more hydroxyl groups attached to a carbon atom.

There are three types of alcohol 

1. Primary Alcohol 

2. Secondary Alcohol 

3. Tertiary Alcohol 

According to uses there are four types of alcohol 

1. Ethyl Alcohol 

2. Denatured Alcohol 

3. Isopropyl Alcohol 

4. Rubbing Alcohol