Etan -> Etilen -> Ancol etylic -> Eten -> Etilenglicol

1) C2H6 -> C2H4 + H2

2) C2H4 + H2O -> C2H5OH

3) C2H5OH -> C2H4 + H2O

1) 2CH4 -> C2H2 + 3H2

2) C2H2 + H2 -> C2H4

3) C2H4 + H2 -> C2H6

4) C2H6 + Cl2 -> C2H5Cl + HCl

1) C6H6 + Br2 -> C6H5Br + HBr

2) C6H5Br + NaOH → C6H5ONa + HBr

3) C6H5ONa + HCl → C6H5OH + NaCl

4) C6H5OH + 3Br2 → C6H2Br3OH + 3HBr