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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.
An alkyl group is a univalent radical consisting of carbon and hydrogen atoms, with one H atom less than their alkane counterparts. They form homologous series with a general formula of CnH2n+1, while the general formula of the alkanes is CnH2n+2.est Answer: Alkyl groups are substituents that have one less H (hydrogen atom) than the corresponding alkane.