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Bleaching of flowers by chlorine is …

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Bleaching of flowers by chlorine is permanent while that by sulphur dioxide is temporary. Why?

Posted by Lokesh Ramadas 6 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Sanskriti S 6 years, 9 months ago

bleaching action of SO2 is due to reduction(nascent [H]). When the bleached substance is exposed to air(O2), it again gets oxidised, ie, coloured. Whereas bleaching action of Cl2 is due to oxidation([O]), which cannot be reversed in presence of air.

Suraj Choudhary 6 years, 9 months ago

Because when chlorine is treated with water it produces nascent oxygen which combines with colour substance and then oxide into colourless substance this property doesn't hold for Sulphur Dioxide that's why bleaching of flower by chlorine is permanent while then by Sulphur dioxide is temporary

Gaurav Sharma 6 years, 9 months ago

What do you mean by flower

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