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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.
The general formula is [math]C_{n}H_{2n}[/math], which is two hydrogen atoms less than the corresponding alkane. Compared to alkanes, alkenes can undergo a larger range of chemical reactions such as combustion and various addition reactions( hydrogenation, addition polymerisation, hydration etc).