| Zinc | Zn + NaOH ⟶ Na2ZnO2 + H2 |
| Zinc | Zn + KOH ⟶ K2ZnO2 + H2 |
| Lead | Pb + NaOH ⟶ Na2PbO2 + H2 |
| Lead | Pb + KOH ⟶ K2PbO2 + H2 |
| Aluminium | Al + NaOH + H2O ⟶ 2NaAlO2 + 3H2 |
| Aluminium | Al + KOH + H2O ⟶ 2KAlO2 + 3H2 |
Action of Alkalis — on oxides and hydroxides of certain metals
| Zinc oxide | ZnO + NaOH ⟶ ____ + ____ |
| Zinc hydroxide | Zn(OH)2 + NaOH ⟶ ____ + ____ |
| Lead [II] oxide | PbO + NaOH ⟶ ____ + ____ |
| Lead hydroxide | Pb(OH)2 + NaOH ⟶ ____ + ____ |
| Aluminium oxide | Al2O3 + NaOH ⟶ ____ + ____ |
| Aluminium hydroxide | Al(OH)3 + KOH ⟶ ____ + ____ |