write the molecular formula of the 2nd and 3rd member of the homologous series whose first member is ethene Share with your friends Share 1 Rishabh Mittal answered this Dear Student, If first member is ethene, then it is a homologous series of alkene.So, next two members arePropene, C3H6Butene, C4H8 Regards 0 View Full Answer Abhinav answered this 2nd is Propene and 3rd is Butene 1 P Elakkiya answered this C3H4, C4H6 2 Aathira Krishnakumar answered this Thanks guys 1