1,
$CH_4+Cl_2\xrightarrow{\rm{ánh\ sáng}} CH_3Cl+HCl$
$CH_4+2Cl_2\xrightarrow{\rm{ánh\ sáng}} CH_2Cl_2+2HCl$
$CH_4+3Cl_2\xrightarrow{\rm{ánh\ sáng}} CHCl_3+3HCl$
$CH_4+4Cl_2\xrightarrow{\rm{ánh\ sáng}} CCl_4+4HCl$
2,
$nCH_2=CH_2\xrightarrow{xt,p,t^o} (\kern-6pt-CH_2-CH_2-\kern-6pt)_n$
3,
$2Na+2H_2O\to 2NaOH+H_2$
$2Na+2C_2H_5OH\to 2C_2H_5ONa+H_2$
4,
$C_6H_{12}O_6+Ag_2O\xrightarrow{dd\ NH_3} C_6H_{12}O_7+2Ag$
5,
$2CH_3COOH+Mg\to (CH_3COO)_2Mg+H_2$
$2CH_3COOH+ZnO\to (CH_3COOH)_2Zn+H_2O$
$CH_3COOH+NaOH\to CH_3COONa+H_2O$
$2CH_3COOH+CaCO_3\to (CH_3COO)_2Ca+CO_2+H_2O$
