\(Z:H_2C=CH_2\\ Y:HC\equiv CH\\ X:H_3C-CH_3\\ H_2C=CH_2+H_2O-H_2SO_4,t^{^0}->H_3C-CH_2-OH\\ C_2H_5OH+O_2-lên.men.giấm->CH_3COOH+H_2O\\ C_2H_2+2Br_2->C_2H_2Br_4\\ C_2H_4+Br_2->C_2H_4Br_2\)
\(X:C_2H_6\\ Y:C_2H_4\\ Z:C_2H_2\\ C_2H_2+H_2\rightarrow\left(Ni,t^o\right)C_2H_4\\ C_2H_4+H_2O\rightarrow\left(H^+,t^o\right)C_2H_5OH\\ C_2H_4+Br_2\rightarrow C_2H_4Br_2\\ C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)