Carry out the transformations according to the scheme, indicate the type of chemical reaction calcium carbide

Carry out the transformations according to the scheme, indicate the type of chemical reaction calcium carbide → acetylene → ethane → ethylene → polyethylene ↓ ↓ acetaldehyde ↓ ethyl alcohol benzene → bromobenzene

1) CaC2 + 2H2O = Ca (OH) 2 + C2H2 2) Ethane is obtained from acetylene in two stages 1.CH≡CH + H2 = CH2 = CH2 (platinum catalyst) CH2 = CH2 + H2 = CH3-CH3 (platinum catalyst) 3) CH3-CH3 -> (in the presence of Ni, Pt, Al2O3, Cr2O3, temperature) H2 + H2C = CH2 4) nCH2 = CH2 -> (in the presence of a catalyst) (- CH2-CH2) n 5) CH≡CH + H2O -> (in the presence of a HgSO4 catalyst) С2H4O 6) 3C2H2 -> (in the presence of an activated carbon catalyst, temperature 450 degrees) C6H6 7) C6H6 + Br2 -> (in the presence of a FeBr3 catalyst) C6H5Br + HBr 8) СH2 = CH2 + H2O -> (in the presence of a catalyst) CH3-CH2OH