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The action of chlorine on dry Ca(OH)2тАЛ produces which of the following?
Hydrochloric acid
Calcium chloride
Bleaching powder
Calcium oxide
Bleaching powder
The action of chlorine gas on dry slaked lime, Ca(OH)2тАЛ, results in the formation of bleaching powder, which is chemically known as calcium oxychloride (CaOCl2тАЛ). This is a classic industrial process for producing bleaching agents used in water purification and textile industries.
The action of chlorine gas on dry slaked lime, Ca(OH)2тАЛ, results in the formation of bleaching powder, which is chemically known as calcium oxychloride (CaOCl2тАЛ). This is a classic industrial process for producing bleaching agents used in water purification and textile industries.
Think of it like 'charging' a substance; just as a battery stores energy, dry lime 'absorbs' chlorine to store its oxidizing power, which is later released when the powder is mixed with water for cleaning.
Remember 'CHL-O-C' for the main components: Calcium, Hydroxide, Chlorine = Oxygen-Calcium-Chloride.
Ca(OH)2тАЛ+Cl2тАЛтЖТCaOCl2тАЛ+H2тАЛO тАФ The chemical reaction for the preparation of bleaching powder.
The reaction involves passing dry chlorine gas over solid dry calcium hydroxide. The chlorine atom replaces the hydroxyl groups in a specific arrangement, forming a solid mixture of calcium chloride and calcium hypochlorite, commonly represented by the formula CaOCl2тАЛ. The equation is: Ca(OH)2тАЛ+Cl2тАЛтЖТCaOCl2тАЛ+H2тАЛO.
Bleaching powder is chemically known as calcium oxychloride.
The reactants must be dry for the formation to occur effectively.
It acts as a strong oxidizing agent due to the presence of chlorine.
It is widely used for disinfecting drinking water to kill germs.
Excellent disinfectant for water treatment.
Stable solid form is easy to store and transport.
Strong bleaching properties for cotton and linen.
Releases chlorine gas if it comes in contact with acids.
Slowly loses its strength over time if exposed to air/moisture.
Sterilization of municipal water supplies.
Bleaching of paper pulp and cotton fabrics.
The term 'dry' in the question is crucial because moist conditions would lead to different decomposition products.
Option A (Hydrochloric acid) is a byproduct of other chlorine reactions but not the primary product here.
Option B (Calcium chloride) is a component of the product mixture, but 'Bleaching powder' is the standard chemical designation for the final industrial product.
Option D (Calcium oxide) is actually a starting reactant for making slaked lime, not a product of chlorination.
C is correct тАФ The reaction between chlorine gas and dry slaked lime yields bleaching powder (CaOCl2тАЛ).
Always distinguish between dry and aqueous reactions in Chemistry, as the presence of water often changes the reaction pathway or the final oxidation state of the products.
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