1)СН₃-СН₂Сl + NaOH -> CH₂=CH₂ + H₂O + NaCl
CH₂=CH₂ + Br₂ -> CH₂Br - CH₂Br
CH₂Br-CH₂Br + Mg -> CH₂=CH₂ + MgBr₂
CH₂=CH₂ + Cl₂ -> CH₂Cl-CH₂Cl
CH₂Cl-CH₂Cl + 2KOH -> CH≡CH + 2KCl + 2H₂O
2) CaC₂ + 2H₂O -> Ca(OH)₂ + C₂H₂
C₂H₂ + H₂O -> CH₃COH
CH₃COH + H₂ -> C₂H₅OH
2C₂H₅OH + 2Na -> 2C₂H₅ONa + H₂