question_answer

   (i) Write the formula and chemical name of bleaching powder. (ii)Write chemical equation to represent the action of atomospheric CO2 gas on bleaching powder when left exposed in open. (iii) State for what purpose is bleaching powder used in water treatment plants.                                       [CBSE Delhi 2007]

Answer:

                  (i) Chemical formula: CaOCI2 Chemical Name: Calcium oxychloride (ii) CaOCI2 + CO2 CaCO3 + C2 (iii) Bleaching powder is used in water treatment plants for disinfecting drinking water to make it free of germs.