$CH_4+Cl_2\xrightarrow{{as}} CH_3Cl+HCl$
$C_2H_5Br+NaOH\xrightarrow{{t^o}} C_2H_5OH+NaBr$
$CH_2=CHCl+KOH\xrightarrow{{\text{p cao}, t^o\rm cao}} CH_3-CHO+KCl$
$CH_3-CH_2Cl+NaOH\xrightarrow{{C_2H_5OH, t^o}} C_2H_4+NaCl+H_2O$
$C_2H_4+H_2O\xrightarrow{{t^o, H^+}} C_2H_5OH$
$C_2H_2+H_2O\xrightarrow{{HgSO_4/H_2SO_4, t^o}} CH_3CHO$
$2C_3H_7OH\xrightarrow{{H_2SO_4, 140^oC}} C_3H_7-O-C_3H_7+H_2O$
$C_6H_5OH+NaOH\to C_6H_5ONa+H_2O$
$C_6H_5OH+3Br_2\to C_6H_2Br_3OH+3HBr$
$2C_6H_5OH+2K\to 2C_6H_5OK+H_2$
$C_2H_5OH+CuO\xrightarrow{{t^o}} CH_3CHO+Cu+H_2O$
$CH_3CHO+2AgNO_3+3NH_3+H_2O\to CH_3COONH_4+2Ag+2NH_4NO_3$
$HCHO+H_2\xrightarrow{{Ni, t^o}} CH_3OH$
$2CH_3CHO+O_2\xrightarrow{{Mn^{2+}, t^o}} 2CH_3COOH$
$HCOOH+Br_2\to CO_2+2HBr$
