Ответ: CaC2 + 2H2O -> Ca(OH)2 + C2H2C2H2 + [O] -> CH3CHOCH3CHO -LiAlH4-> CH3CH2OHCH3CH2OH -H2SO4-> H2C=CH2 + H2OH2C=CH2 + HCl -> CH3CHCl2CH3CH2Cl + 2Na -> CH3CH2CH2CH3 + 2NaCl