Final answer:
Compound CH3CH2CH2OH is an alcohol known as propanol, and it is a primary alcohol because the OH group is attached to a carbon bonded to two hydrogens and another carbon. The option (C) is correct.
Step-by-step explanation:
The student asked which of the following compounds is alcohol:
- a) CH3CH2COOH
- b) CH3CH2OCH3
- c) CH3CH2CH2OH
- d) CH3CH2CHO
Among these, option c) CH3CH2CH2OH is an alcohol, specifically propanol, which is a type of alcohol where the OH (hydroxyl) group is bonded to a saturated carbon atom. Alcohols like propanol can be classified as primary, secondary, or tertiary based on the classification of the carbon to which the OH group is attached. Since the OH group in this structure is attached to a carbon atom that is bonded to two other hydrogen atoms and one other carbon atom, it is a primary alcohol. Therefore, option (C) is correct.