1.

Give the reasons for the bleaching action of chlorine.

Answer»
  • Chlorine acts as a powerful bleaching agent due to its oxidising nature.
  • In moist conditions or in the presence of water it forms unstable hypochlorous acid, HOCl which decomposes giving nascent oxygen which oxidises the vegetable colouring matter of green leaves, flowers, litmus, indigo, etc.

Cl2 + H2O → HCl + HOCl 

HOCl → HCl + [O]

Vegetable coloured matter + [O] → colourless matter.



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