Which of the following is the correct IUPAC name for the compound C2H5-CHO?

Which of the following is the correct IUPAC name for the compound C2H5-CHO?

Step 1: Identify the molecular formula C2H5-CHO. This shows that the compound has two carbon atoms (C2) and a functional group (CHO) that indicates it is an aldehyde.
Step 2: Recognize that aldehydes are named based on the longest carbon chain that includes the carbonyl group (C=O). In this case, the longest chain has two carbon atoms.
Step 3: The base name for a two-carbon aldehyde is derived from 'ethane' (which has two carbons). Since it is an aldehyde, we change the suffix 'ane' to 'al'.
Step 4: Therefore, the IUPAC name for the compound C2H5-CHO is 'Ethanal'.

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