Question

Compare the bleaching properties of so2 and cl2

Answer 1

Both sulphur dioxide and chlorine are good bleaching agents. Bleaching action of chlorine is based on oxidation while that of sulphur is based on reduction.
Chlorine acts with water to produce nascent oxygen. This oxygen combines with colourd substance and makes it colourless.
Sulphour dioxide removes oxygen from the coloured substance and makes it colourless. But atmospheric oxygen slowly takes place of the removed oxygen and because of which the material regains the colour.

Answer 2

Answer: bleaching property of SO2 istemporary but the bleaching property of cl2 is permanent. s o 2bleachers by the production of nascent hydrogen whereas cl2 bleaches by the production of nascent oxygen. Bleaching of SO2 regains on aerial oxidation where does the bleaching of cl2 does not regains

Explanation: