Question

C-->Al4C3-->CH4-->C2H2-->C2H4-->C2H5Cl-->C2H3Cl-->полимер

Answer 1

1.С+Al=Al4C3
2.Al4C3+H2O=Al(OH)3+CH4
3.2CH4=C2H2+3H2 
4.C2H2+HCl=C2H5Cl
5.C2H5Cl=C2H3Cl+H2
6.C2H3Cl+C2H3Cl+...=[-CH2-CHCl-]n