Q 31. Bleaching powder is used as: a. bleaching agent in textile, paper and jute industry b. disinfectant for water to make water free of germs c. oxidising agent in many chemical industries d. All of the above.
Answers
Answer:
Bleaching powder is a colorless white powder which is produced when quicklime is mixed or slaked with water and chlorine. It’s used in industrial settings, such as sewage treatment, paper production and food processing etc.
Explanation:
> Let us know the preparation of bleaching powder.
Bleaching powder is synthesized by the action of chlorine gas, the gas which is produced from the chlor-alkali process, on dry slaked lime.
Ca(OH)2+Cl2⟶CaOCl2+H2O
> Uses of bleaching powder:
1) It is used for bleaching dirty clothes in the laundry, as a bleaching agent for cotton and linen in the textile industry.
2) It is a strong oxidizing agent hence used as an oxidizer in many industries.
3) It is used as a disinfectant which is used for disinfecting water to make potable water. Therefore, option D is the required answer.
The correct answer to the above question is- d. All of the above.
- Bleaching powder is a yellowish-white powder that is produced when calcium hydroxide is added to chlorine and water. When it is added to dilute acid, nascent oxygen is released, hence it acts as an oxidising agent.
Uses of bleaching powder are-
- It is used in laundry to bleach the clothes. It removes the natural colour of clothes. Thus, used as a bleaching agent in cotten, linen and jute industries.
- Bleaching powder is used as an oxidising agent in chemical industries.
- In the paper industry, it is used to bleach or whiten wood pulp to make paper.
- Because of the antimicrobial property of chlorine present in it, it is used in sewage treatment plants to disinfect the water.