To remove very small amount of tiny solid impurities from liquid, we use a_____________________?
Correct answer: D. Coagulant
- A. Pressure filter
- B. Vacuum filter
- C. Centrifugal filter
- D. Coagulant
Explanation
When only a small amount of extremely fine solid is dispersed in a liquid, a coagulant is added to aggregate the particles into larger flocs that can be separated more readily. Filters are generally selected for larger solid loads or already-coagulated particles.
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