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When Bleaching Powder is treated with excess Dil. H2SO4, Cl2 is produced.

CaOCl2 + H2SO4 ----> CaSO4 + H2O + Cl2

CaOCl2 + 2HCl --------> CaCl2 + H2O + Cl2

Chlorine gas produced in this way is known as available chlorine.

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Q: What will happen if bleaching powder reacts with dil sulfuric acid?
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What will be the products when bleaching powder reacts with carbon dioxide?

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