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| Q. |
Name the gas used in preparation of bleaching powder – |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Nitrogen |
| D. | Chlorine |
| Answer» D. Chlorine | |
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Explanation: Bleaching powder in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite be-cause it is considered as a mixed salt of hydrochloric acid and hypochlorous acid. |
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