Is C6H12 an alkane or alkene ? It has all single bonds so it must be alkane but it does not fits to the Generel Formulae of alkanes(CnH2n-1) and instead fits to the General Formulae of alkenes(CnH2n).So what is it ? Share with your friends Share 2 Sandra Rockstar answered this It must be a cyclo-alkane, because all cyclo-hydrocarbons have the formula CnH2n. 5 View Full Answer Aliya Rahmani answered this alkene...... -2