What is the IUPAC name of the compound CH3 CH2 CH3? A. propane B. butane C. methane D. pentane

The correct answer is A. propane.

The IUPAC name of a compound is a systematic way of naming organic compounds. It is based on the number of carbon atoms in the molecule and the type of bonds between them.

The compound CH3CH2CH3 has three carbon atoms and each carbon atom is bonded to two hydrogen atoms. This type of compound is called an alkane. The name of an alkane with three carbon atoms is propane.

The other options are incorrect.

• Option B, butane, has four carbon atoms.
• Option C, methane, has one carbon atom.
• Option D, pentane, has five carbon atoms.