Нужно осуществить превращения: ch4-c2h6-c2h4-c2h2-c6hc-c6h5cl-c6h5oh

CH4 + Cl2 -> CH3Cl + HCl
CH3Cl+ 2Na + Cl-CH3 -> CH3-CH3 + 2NaCl
CH3-CH3 -> CH2=CH2 + H2 (t, kat)
CH2=CH2 -> CH=-CH + H2 (t, kat)
3CH=-CH -> C6H6 (t, kat)
C6H6 + Cl2 -> C6H5Cl+ HCl ( t)
C6H5Cl + NaOH -> C6H5OH + NaCl