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| Q. |
Disinfection of water with ozone is not good because |
| A. | It vanishes before water reaches the consumers |
| B. | It removes the colour, taste and odour from water as bacterias |
| C. | It adds taste to the water |
| D. | It is more efficient than chlorine in killing bacterias |
| Answer» D. It is more efficient than chlorine in killing bacterias | |
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