A. Methanal
B. Propanal
C. Ethanal
D. Butanal
Answer: Ethanal
A. Methanal
B. Propanal
C. Ethanal
D. Butanal
Answer: Ethanal
Additional Information: The IUPAC name for acetaldehyde is ethanal, which is a two-carbon aldehyde with the formula CH3CHO.