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Account for bleaching of flowers by chlorine is permanent but that by sulphur dioxide is temporary. |
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Answer» In presence of moisture, chlorine acts as an oxidizing agent and a bleaching agent. Cl2 + H2O → HCl + HOCl(Unstable) HOCl → HCl + O Nascent oxygen Coloured matter to → Colourless matter. The bleaching action is permanent due to Nascent oxygen. Bleaching action of SO2 in presence of moisture is due to Mascent hydrogen. 2SO4 + 2H2O → H2SO4 + 2H Coloured matter + H → colours matter So, bleaching action of SO2 is temporary |
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