One important alkene addition reaction is hydrogenation., where the alkene undergoes reduction to an alkane. In a hydrogenation reaction, two hydrogen atoms are added across the double bond of an alkene, resulting in a saturated alkane.

What kind of reactions do alkanes undergo?

Alkanes undergo a substitution reaction with halogens in the presence of light. For instance, in ultraviolet light , methane reacts with halogen molecules such as chlorine and bromine. This reaction is a substitution reaction because one of the hydrogen atoms from the methane is replaced by a bromine atom.

Can alkanes undergo addition reaction?

Alkenes undergo addition reactions; alkanes do not.