Verified answer

C3H7OH-->C3H6+H2O

C3H6+H2-->C3H8

C3H6+HBr-->C3H7Br

n(CH3-CH=CH2) = n(-CH2-CH2-CH2-)

CH4+Br2-->CH3Br+HBr

2CH3Br+2Na-->C2H6+2NaBr

C2H6+CL2-->C2H5CL+HCL

C2H5CL-->C2H4+HCL

C2H4+3O2-->2CO2+2H2O

C2H4+HBr-->C2H5Br

C2H5Br-->C2H4+HBr

C2H4+CL2-->C2H4CL2