Bleaching powder is calcium oxychioride CaOCl2. Preparation: On passing chlorine gas through a test tube containing dry slaked lime Ca(OH)2 bleaching powder is produced.
Ca(OH)2 + Cl2 → CaOCl2 + H2O
Uses:
1. It is used as bleaching agent in textile industry and paper factories.
2. It is used as an oxidising agent in chemical industries.
3. It is used as disinfectant for drinking water, to make it germ free.