1)
1)C3H8 =(t,H+)= C3H6 + H2
2)CH3-CH=CH2 + Cl2 = CH2Cl-CH=CH2 + HCl
3)CH2Cl-CH=CH2+Cl2 = CH2Cl-CHCl-CH2Cl
4)CH2Cl-CHCl-CH2Cl + 3KOH = CH2OH-CHOH-CH2OH + 3KCl