Question:
Which type of clay mineral is known for its high swelling and shrinkage?
Which type of clay mineral is known for its high swelling and shrinkage?
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Montmorillonite has a high swelling property because water can enter between its clay layers.
Updated On: May 7, 2026
- Kaolinite
- Montmorillonite
- Illite
- Chlorite
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The Correct Option is B
Solution and Explanation
Clay minerals have different structures and different water absorption properties.
Montmorillonite is a smectite clay mineral.
It has a layered structure in which water molecules can enter between the layers.
Because of this, montmorillonite can absorb a large amount of water.
When it absorbs water, it swells.
When water is removed during drying, it shrinks.
Therefore, montmorillonite shows high swelling and high shrinkage.
Kaolinite has low plasticity and low swelling.
Illite shows moderate properties.
Chlorite also does not show swelling as strongly as montmorillonite.
Hence, the clay mineral known for high swelling and shrinkage is:
\[
\text{Montmorillonite}.
\]
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