Question

C2H6->C2H4->C2H5OH->C4H6

Answer 1

ch3-ch3(t,pt)-> ch2=ch2+ h2
ch2=ch2+ h2o(H+,t)-> ch3-ch2oh
2ch3-ch2oh(ZnO, Al2o3,t)-> ch2=ch-ch=ch2+ 2h20
+ h2