Chemistry Reactivity due to pi-electrons is present in_________________? Options:A. alkaneB. alkeneC. alkyneD. both B & CView AnswerD. both B & C Continue Reading Previous: By which method the molecular mass of benzene was determined as 78.108 ?Next: Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?