Question

what is bleaching powder chemically how it is prepared what happen when Bleaching powder is exposed to Air for long time give any two important uses of bleaching powder​

Answer 1

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Answer 2

Answer:

CaOCl2 is bleaching powder

Formation/Preparation:

It is prepared by adding Cl-obtained from chlor alkali process-to CaOH (slaked lime)

Ca(OH)2 + Cl2 = CaOCl2 + H2O

When it is exposed to air,it reacts with atmospheric carbon dioxide (CO2) to form Calcium carbonate and give chlorine gas {hence it also smells of chlorine}

CaOCl2 + CO2 = CaCO3 + Cl2

Uses:

1. for bleaching

• cotton and linen in textile industry
• wood pulp in paper factories
• washed clothes in laundry

2. as an oxidising agent in many chemical industries

3. to make drinking water free from germs

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