The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called__________________?
Correct answer: C. Elutriation or elution
- A. Decoction
- B. Percolation
- C. Elutriation or elution
- D. None of these
Explanation
When the soluble material is concentrated on the surface of an insoluble solid, the solvent mainly washes it away rather than dissolving it throughout the solid matrix; this is called elution or washing. Percolation involves solvent passing through a bed, while decoction uses boiling.
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