a,
(1) $CH_3COONa+NaOH \buildrel{{t^o}}\over\to CH_4+Na_2CO_3$
(2) $2CH_4\buildrel{{1500^oC}}\over\to C_2H_2+3H_2$
(3) $C_2H_2+H_2\buildrel{{Pd/PbCO_3, t^o}}\over\to C_2H_4$
(4) $C_2H_4+H_2\buildrel{{t^o}}\over\to C_2H_6$
(5) $C_2H_6+Cl_2\buildrel{{as}}\over\to C_2H_5Cl+HCl$
b,
(1) (giống (3)a)
(2) $C_2H_4+H_2O\buildrel{{H^+, t^o}}\over\to C_2H_5OH$
(3) $C_2H_5OH+CuO\buildrel{{t^o}}\over\to CH_3CHO+Cu+H_2O$
c,
(1) (giống (2)a)
(2) (giống (3)a)
(3) (giống (2)b)
(4) $2C_2H_5OH\buildrel{{H_2SO_4, 140^oC}}\over\to C_2H_5-O-C_2H_5+H_2O$
