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Answer:
1) Bleaching Powder's chemical formula is CaOCl2 and is called Calcium Oxychloride. It is prepared on dry slaked lime by chlorine gas.
It is used for bleaching dirty clothes in the laundry, as a bleaching agent for cotton and linen in the textile industry. It is a strong oxidizing agent, hence used as an oxidizer in many industries. It is used as a disinfectant which is used for disinfecting water to make potable water.
2) neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.( Balanced chemical reaction in the picture above)
3) The atomic radius usually increases while going down a group due to the addition of a new energy level (shell which causes shrinkage in the size of the atoms across the period). However, atomic radii tend to increase diagonally, since the number of electrons has a larger effect than the sizeable nucleus.
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