Which suffix is used when the -CHO group is attached to a carbon atom of a ring or ring system, or to a heteroatom?

Correct option is D

The correct answer is (d) Carbaldehyde.
• The suffix "carbaldehyde" is used in IUPAC nomenclature when the -CHO group (formyl group) is attached to a carbon atom of a ring or ring system, or to a heteroatom.
• This naming convention helps to distinguish between aldehydes attached to non-ring structures and those attached to ring structures.
• Examples include "benzenecarbaldehyde" (commonly known as benzaldehyde) for a -CHO group attached to a benzene ring.
Information Booster:
• Amide: This suffix is used for compounds containing the -CONH2 group.
• Halide: This term is used for compounds containing halogen atoms (F, Cl, Br, I) attached to the carbon chain.
• Nitrile: This suffix is used for compounds containing the -CN (cyano) group.