Hydrocarbons - Functional groups Helping students learn the common functional groups of hydrocarbons. Simple drag and drop exercise. Drag Chemical formula to their names Propan-1-ol Ethane Ethene Ethyne Ethanol Ethanoic acid Ethyl ethanoate Ethanal Propanone Propanal CH3CH2CH2OH C2H6 single bonds C2H4 double bond C2H2 triple bond CH3CH2OH CH3COOH CH3COOCH2CH3 CH3CHO CH3COCH3 CH3CH2CHO