The most common filter aid is_________________?
Correct answer: A. Diatomaceous earth
- A. Diatomaceous earth
- B. Calcium silicate
- C. Sodium carbonate
- D. Silica gel
Explanation
Diatomaceous earth, also called kieselguhr, is the most widely used filter aid because its porous structure forms a permeable cake that retains fine particles while allowing liquid to pass. Silica gel and sodium carbonate do not serve this general filtration role.
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