What is the IUPAC name for this compound?

Question

Quizplus · Accepted Answer

The compound shown is a two-carbon aldehyde with the functional group attached to the first carbon. According to IUPAC nomenclature rules, this compound is named ethanal, also known as acetaldehyde. Choice A and E are incorrect because aldehydes with more than one carbon are not named as "methyl aldehyde" or "methanal." Choice B is incorrect because the numbering of the carbon chain should begin at the end closest to the functional group, giving it a lower number. Choice C is incorrect because the compound does not contain a carbonyl group attached to the second carbon.

What Is the IUPAC Name for This Compound