memorise

• Sodium Zincate

  Na2ZnO2 + H2
• 2NaOH + Zn


  Na2ZnO2
• Ca(OH)2 + CO2

  CaCO3 + H2O
• CaCO3 + H2O + CO2

  Ca(HCO3)2
• Formula for bleaching powder

  Ca(OH)2 + Cl2 -> CaOcl2 + H2O
• chlor-alkali process

  2NaCl + 2H2O -> 2NaOH + Cl2 + H2