б) CH3-CH2OH --(160°C, H2SO4(конц.))--> СН2=СН2 + Н2ОСН2=СН2 + Н2 --(t°, Ni)--> CH3-CH3CH3-CH3 + Cl2 --(hv)--> CH3-CH2Cl + HClCH3-CH2Cl + NaOH(водн.) --> СН3-СН2ОН + NaClCH3-CH2OH --(400°C, Cu)--> CH3-CHO + H2