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    Question

    Variations in moisture content result in the clay soil's

    characteristic swelling and shrinking. It is due to presence of ____________ mineral.
    A Kaolinite Correct Answer Incorrect Answer
    B Montmorillonite Correct Answer Incorrect Answer
    C Llite Correct Answer Incorrect Answer
    D Vermiculite Correct Answer Incorrect Answer

    Solution

    Bentonite clay shows swelling and shrinkage of soil due to the presence of Montmorillonite minerals . Montmorillonite consists of hydrated aluminum silicate. Volcanic ash weathers to become montmorillonite. pH of such soil is 5.6.

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