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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.
Aldehyde. Aldehydes have a carbonyl group. This carbonyl group is bonded to another carbon from one side, and from the other end, it is connected to hydrogen. Therefore, aldehydes can be characterized with the âCHO group, and following is the general formula of an aldehyde.The simplest aldehyde is formaldehyde.ldehyde. Aldehydes have a carbonyl group. This carbonyl group is bonded to another carbon from one side, and from the other end, it is connected to hydrogen. Therefore, aldehydes can be characterized with the âCHO group, and following is the general formula of an aldehyde. The simplest aldehyde is formaldehyde.