Question

During electrolysis of brine, a gas G is liberated at anode When this gas ‘G’ is passed through slaked lime, a compound ‘C’ is formed, which is used for disinfecting drinking water.

1. Write formula of ‘G’ and ‘C’.
2. State the chemical equation involved.
3. What is common name of compound ‘C’? Give its chemical name.

Answer 1

Chlorine reacts with dry slaked lime Ca(OH)₂ to form bleaching powder. When aqueous sodium chloride is electrolysed, chlorine is created.

1. G: Cl₂, C: CaOCl₂
2. Ca(OH)₂ + Cl₂ → CaOCl₂ + H₂O
3. Bleaching powder