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Q: The process of separating impurities form a suspending fluid by the action of natural forces alone is called :
  • A. Chemical precipitation
  • B. Discrete particles
  • C. Plain sedimentation
  • D. Sedimentation with coagulation
Correct Answer: Option C - Sedimentation is the removal of suspended particles by gravitational settling. Plain Sedimentation– When the impurities are separated from suspending fluid by action of natural forces alone, i.e. by gravitation and natural aggregation of the settling particles, the operation is called plain sedimentation. Chemical precipitation– When chemicals are added to throw dissolved impurities out of solution, Discrete particles– A particles that does not alter its shape, size and weight while settling or rising in water is known as discrete particles. Sedimentation with Coagulation– When chemicals or other substances are added to induce or hasten aggregation and settling of finely divided suspended matter, colloidal substance, and large molecules.
C. Sedimentation is the removal of suspended particles by gravitational settling. Plain Sedimentation– When the impurities are separated from suspending fluid by action of natural forces alone, i.e. by gravitation and natural aggregation of the settling particles, the operation is called plain sedimentation. Chemical precipitation– When chemicals are added to throw dissolved impurities out of solution, Discrete particles– A particles that does not alter its shape, size and weight while settling or rising in water is known as discrete particles. Sedimentation with Coagulation– When chemicals or other substances are added to induce or hasten aggregation and settling of finely divided suspended matter, colloidal substance, and large molecules.

Explanations:

Sedimentation is the removal of suspended particles by gravitational settling. Plain Sedimentation– When the impurities are separated from suspending fluid by action of natural forces alone, i.e. by gravitation and natural aggregation of the settling particles, the operation is called plain sedimentation. Chemical precipitation– When chemicals are added to throw dissolved impurities out of solution, Discrete particles– A particles that does not alter its shape, size and weight while settling or rising in water is known as discrete particles. Sedimentation with Coagulation– When chemicals or other substances are added to induce or hasten aggregation and settling of finely divided suspended matter, colloidal substance, and large molecules.