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प्रश्न
Give a reason for the following.
Alum is added to water in sedimentation tanks.
टीपा लिहा
उत्तर
Reason:
- Chemical substance potash alum is added to water to speed up the process of sedimentation.
- This process is called loading.
- The particles of potash alum combine with the suspended impurities and make them settle down at a faster rate.
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