Fri March 08, 2013 By: Muhsina Mohamed

Why is the bleaching action of Cl2 permanent whereas that of SO2 temporary?

Expert Reply
Fri March 08, 2013
Bleaching action of Cl2 is due to nascent O while SO2 is nascent H so if the bleached article by SO2 exposed to air the reverse process takes place so ,bleaching bySO2 is temporary.
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