Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

To determine the anhydride of the oxoacid present in bleaching powder, we need to understand the composition of bleaching powder and the nature of oxoacids.

1. Start by examining the composition of bleaching powder. Bleaching powder is a chemical compound that typically contains calcium hypochlorite (Ca(ClO)2) as its main component. However, it may also contain other salts and impurities.

2. Next, identify the oxoacid present in bleaching powder. Oxoacids are acids that contain oxygen, hydrogen, and another element. In this case, the oxoacid in question is likely to be chloric acid (HClO3), as it is commonly used in the production of bleaching powder.

3. Now, we need to find the anhydride of chloric acid. An anhydride is a compound that is formed by removing water from an acid. In the case of chloric acid, its anhydride is chloric anhydride (Cl2O7). This compound is formed by removing water (H2O) from two molecules of chloric acid.

Therefore, the anhydride of the oxoacid present in bleaching powder is chloric anhydride (Cl2O7).