a,
- Cách 1:
$AgNO_3\buildrel{{t^o}}\over\to Ag+NO_2+0,5O_2$
- Cách 2:
$Cu+2AgNO_3\to Cu(NO_3)_2+2Ag$
b,
- Cách 1:
$ZnS+1,5O_2\buildrel{{t^o}}\over\to ZnO+SO_2$
$ZnO+CO\buildrel{{t^o}}\over\to Zn+CO_2$
- Cách 2:
$ZnCO_3\buildrel{{t^o}}\over\to ZnO+CO_2$
$ZnO+CO\buildrel{{t^o}}\over\to Zn+CO_2$
c,
$SnO_2+2CO\buildrel{{t^o}}\over\to Sn+2CO_2$
d,
$PbS+1,5O_2\buildrel{{t^o}}\over\to PbO+SO_2$
$PbO+CO\buildrel{{t^o}}\over\to Pb+CO_2$