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| Q. |
Which one of the following is extensively used for sterilizing water? |
| A. | Bleaching powder |
| B. | Alum |
| C. | Borax powder |
| D. | Soda powder |
| Answer» A. Bleaching powder | |
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Explanation: Bleaching powder is extensively used in sterilizing water. Calcium hypochlorite is a chemical compound with formula Ca(OCl)2. It is widely used for water treatment and as a bleaching agent (bleaching powder). This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochicnite (liquid bleach). Calcium hypochlorite is a yellow white solid which has a strong smell of chlorine. It is not highly soluble in water, and is more preferably used in soft to medium-hard water. It has two forms: a dry form and a hydrated form. The hydrated form is safer to handle. |
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