Verified answer

и) C3H8 ---> C3H6 ---> СH2 =  CH - CH3 ---> СH2 =  CH - CH2Cl  ---> СH3 - CH2 - CH2OH ---> СH3 - CH2 - COOH --->  СH3 - CH2 - COOK ---> C2H6

                               Ni,t

СH3 - CH2 - CH3 -------- > СH2 =  CH - CH3

                                           t=250C

2СH2 =  CH - CH3 + Cl2 ---------> 2СH2 =  CH - CH2Cl  

                                            Ni,t

СH2 =  CH - CH2Cl  + H2 ------ > СH3 - CH2 - CH2Cl

СH3 - CH2 - CH2Cl + NaOH ----- > СH3 - CH2 - CH2OH

                                              Kt,t

СH3 - CH2 - CH2OH + O2 ----- > СH3 - CH2 - COOH + H2O

2СH3 - CH2 - COOH + 2K ------ > 2СH3 - CH2 - COOK + H2↑

                                                  t

СH3 - CH2 - COOK + KOH -------- > CH3 - CH3 + K2CO3

к) C6H6 ---> C6H5CH3 ---> C6H5COOH ---> C6H5COOCH3       

              AlCl3

C6H6 +  CH3Cl ------------ > C6H5CH3 + HCl

                               K2MnO4

C6H5CH3 + [O] --------------- > C6H5COOH + H2O

                                          H2SO4

C6H5COOH + CH3OH --------------> C6H5COOCH3 + H2O