Вроде так:
№1
C2H6-->C2H5Cl-->C2H5OH-->CH3-COOH-->Cl-CH2-COOH-->NH2-CH2-COOH
C2H6+Cl2 = HCl+C2H5Cl
C2H5Cl + KOH = C2H5OH
C2H5OH + K2CrO7 + H2SO4 = CH3COOH + Cr2(SO4)3 + K2SO4 + H2O
CH3COOH + Cl2 = ClCH2COOH + HCl
ClCH2COOH + 2NH3 → NH2CH2COOH + NH4Cl