Question

1) CH3-> CH3-CH3-> CH3-CH2-OH-> CH3-CH3

Answer 1

CH3+CH3=CH3-CH3;

CH4+Cl2=CH3Cl+HCl;
CH3Cl+2Na+CH3Cl=CH3-CH3+2NaCl;
С2Н6+Cl2-> C2H5Cl+HCl;
C2H5Cl+NaOH->C2H5OH+NaCl;
C2H5OH(t>140)=C2H4+H2O.