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alkane-CnH2n+2 alkene-CnH2n alkyl-CnH2n+1 aldehyde-R-CHO where R is any alkyl group ketone-R-CO-R where R is any alkyl group cycloalkane-CnH2n. svetlana Â· 5 years ago.
Aldehydes and ketones are collectively called carbonyl compounds. They contain the C=0 or carbonyl group. Aldehydes contain the carbonyl group bonded to at least one hydrogen atom as well as an alkyl or aryl group.