A sample of bleahing powder was kept in an air tight container. After a month, it lost some of its chlorine content. How will ou account for it ?

Explanation

Bleaching powder If kept even in an air tight container, will slowly decompose of its own and form calcium chlorate and calcium chloride. The reaction is called auto-oxidation. This will result in decrease in its chlorine contents.
`underset("Bleaching powder")(6CaOCl_(2))tounderset("Calcium chlorate")(Ca(ClO_(3))_(2))+underset("Calcium chloride")(5CaCl_(2))`