Verified answer

1) 2CH4 = C2H2 + 2H2

                                               O

                                              //

2)C2H2 + H2O = CH3 - C

                                            \

                                             H

Над стрелкой напиши - катализатор HgSO4

                     O

                    //

3) CH3 - C      + H2 = CH3 - CH2 - OH

                 \

                  H

Над стрелкой - t,  катализатор

4)CH3 - CH2 - OH + HBr= CH3 - CH2 - Br + H2O

5)CH3 - CH2 - Br+ KOH = C2H5OH + KBr

    C2H5OH = C2H4 + H2O

6)C2H4 + H2O = C2H5OH

Над стрелкой - t, H2SO4 (конц)

                                                                 O

                                                                //

7)CH3 - CH2 - OH + СuO = CH3 - C      + Cu + H2O

                                                               \

                                                                H

 над стрелкой - t