- Zn(OH)2,Al2O3,Na2CO3Zn ( OH )_{2}, Al _{2} O _{3}, Na _{2} CO _{3}
- Al2O3,ZnO,NaHCO3Al _{2} O _{3}, ZnO , NaHCO _{3}
- AlCl3,Al2O3,Al(OH)2AlCl _{3}, Al _{2} O _{3}, Al ( OH )_{2}
- ZnO,Zn(OH)2,NH4ClZnO , Zn ( OH )_{2}, NH _{4} Cl