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4. What is bleaching powder? How is ble iching powder prepared?5. What is meant by waters of crystallisation in a substance?

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A a powder containing calcium hypochlorite, used chiefly to remove colour from materials. Chemical formula of Bleaching Powder is CaOCl2 and its Chemical name is Calcium Oxychloride. It is Prepared by Chlorine gas over dry slaked lime. Generally this method is used in large scale preparation of bleaching powder.

In chemistry, water of crystallization or water of hydration or crystallization water is water molecules that are present inside crystals. ... In some contexts, water of crystallization is the total mass of water in a substance at a given temperature and is mostly present in a definite (stoichiometric) ratio.



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