The bleaching action of bleaching powder is due to "available chlorine". It is the amount of chlorine
Correct answer: C. that is required for the generation of hypochlorine
- A. that is required for the preparation of bleaching powder
- B. site free when excess of sulphuric acid is added to the bleaching powder
- C. that is required for the generation of hypochlorine
- D. Both B and C
Explanation
The bleaching action of bleaching powder is due to the release of "available chlorine" when it comes into contact with an acidic substance, like sulfuric acid. When bleaching powder (calcium hypochlorite, Ca(ClO)2) is treated with an acid, it decomposes to release hypochlorous acid (HClO) and calcium sulfate (CaSO4). Hypochlorine acid is the active bleaching agent responsible for its bleaching properties.
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