1.

Give scientific reasons:There are various brands of bleaching powder in the market.

Answer»
  • When bleaching powder comes in contact with air, it reacts with carbon dioxide to form calcium carbonate and releases chlorine gas.

CaOCl2 + CO2 → CaCO3 + Cl2 ↑ (from air)

  • This generated chlorine is known as “available chlorine.”
  • On the basis of the percentage of “available chlorine” various brands of bleaching powder are available in the market.


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