1) С2Н6 +СL2 = C2H5CL + Hcl
C2H5CL + KOH (spirt)---> C2H4+ KCL + H2O
C2H4 + H2O---> C2H5OH
C2H5OH ---> C2H4 + H2O
C2H4 + KOH(spirt) ---> C2H2
2) C3H6 + H2O (kation H)--> C3H7OH
C3H7OH ----> CH2=CH-CH3 +H2O
C3H6 + Br2 --> дибромпропан -2,2
С3H6Br2 +KOH(spirt) ----> C3H4