20. Give three uses each of the following (a) bleaching powder (b) baking soda.
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Answer:
(i) It is used for bleaching cotton and linen textile industry, for bleaching wood pulp in paper industry and for washed clothes in laundry. (ii) It is also used as a disinfectant for water to make it germ free. (iii) It is used as an oxidizing agent in many chemical industries.
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Explanation:
The three uses of bleaching powder (CaOCl2) is
1.Bleaching: Used for bleaching cotton and linen in the textile industry, bleaching wood pulp in paper industry, bleaching washed clothes in industry
2.Oxidising Agent: Used as an oxidising agent in chemical industries
3.Disinfectant: Used for disinfecting drinking water.
The t three uses of baking soda(NaHCO3)
1. used as an antacid, being alkaline neutralised excess acid in stomach.
2.used in soda fire extinguisher
3. For making baking powder for making the cake fluppy, soft and spongy
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