Which one of the following clay mineral has the highest CEC?
Correct answer: C. Vermiculite
- A. Kaolinite
- B. Montmorillonite
- C. Vermiculite
- D. Illite
Explanation
Vermiculite generally has the highest cation exchange capacity among the listed clay minerals, followed by montmorillonite, illite and kaolinite. Its high CEC is linked to strong permanent negative charge and expandable layers.
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