Practice!

Sample Problem

Identify the functional group(s) of ketones (R represents any type of carbon chain):

Solution

Ketones are organic compounds that contain a carbonyl group (a carbon atom double bonded to an oxygen atom) bonded to two other carbon atoms. Therefore only option D fits this description. The carbonyl group in options B, C, and E are only bonded to one other carbon atom. Option A is the hydroxyl group, the functional group of alcohols.