Question:

The most expansive clay mineral is:

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Montmorillonite has the highest swelling potential among clay minerals, making it the most expansive.
Updated On: Sep 24, 2025
  • Quartz
  • Montmorillonite
  • Kaolinite
  • Illite
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The Correct Option is B

Solution and Explanation

Step 1: Expansive Clay Minerals.
The most expansive clay mineral is Montmorillonite. This mineral has a high ability to swell when exposed to water, making it the most expansive type of clay.

Step 2: Conclusion.
Thus, the correct answer is Montmorillonite, making option (2) the correct answer.

Final Answer: \[ \boxed{2. \, \text{Montmorillonite}} \]
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