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    Question

    Which type of soil exhibits permanent hardness due to

    its content of calcium chloride?
    A NaCl Correct Answer Incorrect Answer
    B KCl Correct Answer Incorrect Answer
    C CaCl₂ Correct Answer Incorrect Answer
    D Ca(HCO₃)₂ Correct Answer Incorrect Answer

    Solution

    Calcium chloride (CaCl₂ ) in water contributes to its permanent hardness. This type of hardness cannot be removed by boiling, unlike temporary hardness, and typically requires a water softener or ion exchange process to be treated.

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