When converting from common names to IUPAC names:
- Ethylene is an alkene, so its IUPAC name is "Ethene."
- Acetylene is an alkyne, so its IUPAC name is "Ethyne."
- Acetic acid is a carboxylic acid, so its IUPAC name is "Ethanoic acid."
- Methyl alcohol is a simple alcohol, so its IUPAC name is "Methanol."
- Acetone is a ketone, and its IUPAC name is "Propane-2-one."