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Swelling potential of Illite is significantly less than that of montmorillonite… — Answer & Solution | Civexa

Soil Mechanics · Clay Mineralogy

Clay Mineralogy MCQ with answer and solution

Swelling potential of Illite is significantly less than that of montmorillonite due to

Solution

Concept

Illite bonding

Step-by-step solution

1. In illite, potassium ions bind adjacent layers strongly. 2. This limits water entry and swelling.

Explanation

The potassium bond makes illite less expansive than montmorillonite.

Why the other options are wrong

The others are not the bond holding illite layers.

Shortcut

Illite = K bond.

Correct answer: A) Potassium bond

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